BU-706: Summary of Do’s and Don’ts
Discover ways to extend battery life by following simple guidelines.
“What can I do to keep my batteries longer?” many people ask. As folks stay fit by refraining from smoking, lowering sugar intake and exercising, so also can battery life be extended. There are no hard numbers as to how effective good care is, but the proof is in examples where packs were issued as personal goods as opposed to stock items. Personal care almost always wins.
Table 1 summarizes how to prolong battery life through proper attention. Because of similarities within systems, the chemistries are limited to lead, nickel and lithium.
|
Battery care |
Lead acid: Flooded, sealed, gel, AGM |
Nickel-based: |
Lithium-ion: Cobalt, manganese, NMC |
|
Best way |
Apply saturated charge to prevent sulfation; can remain on charge with the correct float voltage. |
Avoid getting battery too hot on charge. Do not leave battery in charger for more than a few days Subject to memory. |
Partial and random charge is fine; does not need full charge; lower voltage limit preferred; keep battery cool. |
|
Charge methods |
Constant voltage to 2.40–2.45/cell, float |
Constant current, trickle charge at 0.05C, fast charge preferred. |
Constant voltage to 4.20V/cell; no trickle charge; battery can |
|
Discharge |
Can endure high peak currents. Avoid full discharges. Charge after each use. |
Do not over-discharge on a heavy load; cell reversal causes short. Avoid full discharges. |
Prevent full cycles, apply some charge after a full discharge to keep the protection circuit alive. |
|
How to prolong battery |
Limit deep cycling; do not deep-cycle starter battery. Apply fully saturation charge. Avoid heat. |
To prevent memory, discharge packs in regular use to 1V/cell every 1–3 months (mainly NiCd) |
Keep cool. Operate in mid SoC of 20–80%. Prevent ultra-fast charging and high loads (most Li-ion) |
|
Storage |
Keep cells at >2.05V. Apply topping charge every 6 months to prevent sulfation. |
Store in cool place; NiCd stores for 5 years; prime before use |
Store at 40% charge in cool place (40% SoC reads 3.75–3.80V/cell). Do not go below 2.0V/cell. |
|
Disposal |
Toxic. Do not dispose. Electrolyte corrosive. Profitable to recycle. |
NiCd: Do not dispose. |
Low toxicity. Can be disposed of in low volume. Best to recycle. |
Table 1: Do’s and don’ts summary of how to use, maintain and dispose of batteries.
| Caution: |
Under no circumstances should batteries be incinerated, as fire can cause an explosion. Wear approved gloves when touching electrolyte. On exposure to skin, flush with water immediately. If eye exposure occurs, flush with water for 15 minutes and consult a physician immediately. |
Last updated 2016-04-02
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- BU-001: Sharing Battery Knowledge
- BU-002: Introduction
- BU-003: Dedication
- BU-101: When Was the Battery Invented?
- BU-102: Early Innovators
- BU-103: Global Battery Markets
- BU-103a: Battery Breakthroughs: Myth or Fact?
- BU-104: Getting to Know the Battery
- BU-104a: Comparing the Battery with Other Power Sources
- BU-104b: Battery Building Blocks
- BU-104c: The Octagon Battery – What makes a Battery a Battery
- BU-105: Battery Definitions and what they mean
- BU-106: Advantages of Primary Batteries
- BU-106a: Choices of Primary Batteries
- BU-107: Comparison Table of Secondary Batteries
- BU-201: How does the Lead Acid Battery Work?
- BU-201a: Absorbent Glass Mat (AGM)
- BU-202: New Lead Acid Systems
- BU-203: Nickel-based Batteries
- BU-204: How do Lithium Batteries Work?
- BU-205: Types of Lithium-ion
- BU-206: Lithium-polymer: Substance or Hype?
- BU-206a: Finding the Optimal Runtime and Power Ratio of Li-ion
- BU-208: Cycling Performance
- BU-209: How does a Supercapacitor Work?
- BU-210: How does the Fuel Cell Work?
- BU-210a: Why does Sodium-sulfur need to be heated
- BU-210b: How does the Flow Battery Work?
- BU-211: Alternate Battery Systems
- BU-212: Future Batteries
- BU-213: Cycle Performance of NiCd, NiMH and Li-ion
- BU-214: Summary Table of Lead-based Batteries
- BU-215: Summary Table of Nickel-based Batteries
- BU-216: Summary Table of Lithium-based Batteries
- BU-217: Summary Table of Alternate Batteries
- BU-218: Summary Table of Future Batteries
- BU-301: A look at Old and New Battery Packaging
- BU-301a: Types of Battery Cells
- BU-302: Series and Parallel Battery Configurations
- BU-303: Confusion with Voltages
- BU-304: Why are Protection Circuits Needed?
- BU-304a: Safety Concerns with Li-ion
- BU-304b: Making Lithium-ion Safe
- BU-305: Building a Lithium-ion Pack
- BU-306: What is the Function of the Separator?
- BU-307: How does Electrolyte Work?
- BU-308: Availability of Lithium
- BU-309: How does Graphite Work in Li-ion?
- BU-310: How does Cobalt Work in Li-ion?
- BU-311: Battery Raw Materials
- BU-401: How do Battery Chargers Work?
- BU-401a: Fast and Ultra-fast Chargers
- BU-402: What Is C-rate?
- BU-403: Charging Lead Acid
- BU-404: What is Equalizing Charge?
- BU-405: Charging with a Power Supply
- BU-406: Battery as a Buffer
- BU-407: Charging Nickel-cadmium
- BU-408: Charging Nickel-metal-hydride
- BU-409: Charging Lithium-ion
- BU-410: Charging at High and Low Temperatures
- BU-411: Charging from a USB Port
- BU-412: Charging without Wires
- BU-413: Charging with Solar, Turbine
- BU-413a: How to Store Renewable Energy in a Battery
- BU-414: How do Charger Chips Work?
- BU-415: How to Charge and When to Charge?
- BU-501: Basics about Discharging
- BU-501a: Discharge Characteristics of Li-ion
- BU-502: Discharging at High and Low Temperatures
- BU-503: How to Calculate Battery Runtime
- BU-504: How to Verify Sufficient Battery Capacity
- BU-601: How does a Smart Battery Work?
- BU-602: How does a Battery Fuel Gauge Work?
- BU-603: How to Calibrate a “Smart” Battery
- BU-604: How to Process Data from a “Smart” Battery
- Close Part One Menu
Introduction
Crash Course on Batteries
Battery Types
Packaging and Safety
Charge Methods
Discharge Methods
"Smart" Battery
- BU-701: How to Prime Batteries
- BU-702: How to Store Batteries
- BU-703: Health Concerns with Batteries
- BU-704: How to Transport Batteries
- BU-704a: Shipping Lithium-based Batteries by Air
- BU-704b: CAUTION & Overpack Labels
- BU-704c: Class 9 Label
- BU-705: How to Recycle Batteries
- BU-705a: Battery Recycling as a Business
- BU-705b: Giving Batteries a Second Life
- BU-706: Summary of Do’s and Don’ts
- BU-801: Setting Battery Performance Standards
- BU-801a: How to Rate Battery Runtime
- BU-801b: How to Define Battery Life
- BU-802: What Causes Capacity Loss?
- BU-802a: How does Rising Internal Resistance affect Performance?
- BU-802b: What does Elevated Self-discharge Do?
- BU-802c: How Low can a Battery be Discharged?
- BU-803: Can Batteries Be Restored?
- BU-803a: Cell Matching and Balancing
- BU-803b: What causes Cells to Short?
- BU-803c: Loss of Electrolyte
- BU-804: How to Prolong Lead-acid Batteries
- BU-804a: Corrosion, Shedding and Internal Short
- BU-804b: Sulfation and How to Prevent it
- BU-804c: Acid Stratification and Surface Charge
- BU-805: Additives to Boost Flooded Lead Acid
- BU-806: Tracking Battery Capacity and Resistance as part of Aging
- BU-806a: How Heat and Loading affect Battery Life
- BU-807: How to Restore Nickel-based Batteries
- BU-807a: Effect of Zapping
- BU-808: How to Prolong Lithium-based Batteries
- BU-808a: How to Awaken a Sleeping Li-ion
- BU-808b: What causes Li-ion to die?
- BU-808c: What the User Can Do
- BU-809: How to Maximize Runtime
- BU-810: What Everyone should Know about Aftermarket Batteries
- BU-901: Fundamentals in Battery Testing
- BU-902: How to Measure Internal Resistance
- BU-902a: How to Measure CCA
- BU-903: How to Measure State-of-charge
- BU-904: How to Measure Capacity
- BU-905: Testing Lead Acid Batteries
- BU-906: Testing Nickel-based Batteries
- BU-907: Testing Lithium-based Batteries
- BU-908: Battery Management System (BMS)
- BU-909: Battery Test Equipment
- BU-910: How to Repair a Battery Pack
- BU-911: How to Repair a Laptop Battery
- BU-912: How to Repair Mobile Phone Batteries
- BU-913: How to Maintain Fleet Batteries
- Close Part Two Menu
From Birth to Retirement
How to Prolong Battery Life
Battery Testing and Monitoring
- BU-1001: Batteries in Industries
- BU-1002: Electric Powertrain, then and now
- BU-1002a: Hybrid Electric Vehicles and the Battery
- BU-1003: Electric Vehicle (EV)
- BU-1004: Charging an Electric Vehicle
- BU-1005: Does the Fuel Cell-powered Vehicle have a Future?
- BU-1006: Cost of Mobile Power
- BU-1007: Net Calorific Value
- BU-1008: Working towards Sustainability
- BU-1009: Battery Paradox - Afterword
- BU-1101: Glossary
- BU-1102: Abbreviations
- BU-1103: Bibliography
- BU-1104: About the Author
- BU-1105: About Cadex
- BU-1403: Author’s Creed
- BU-1501 Battery History
- BU-1502 Basics about Batteries
- BU-1503 How to Maintain Batteries
- BU-1504 Battery Test & Analyzing Devices
- BU-1505 Short History of Cadex
- Battery Diagnostics On-the-fly
- Making Battery State-of-health Transparent
- Batteries will eventually die, but when and how?
- Why does Pokémon Go rob so much Battery Power?
- How to Care for the Battery
- How to Rate Battery Runtime
- Tesla’s iPhone Moment — How the Powerwall will Change Global Energy Use
- Painting the Battery Green by giving it a Second Life
- Charging without Wires — A Solution or Laziness
- What everyone should know about Battery Chargers
- A Look at Cell Formats and how to Build a good Battery
- Battery Breakthroughs — Myth or Fact?
- Rapid-test Methods that No Longer Work
- Shipping Lithium-based Batteries by Air
- How to make Batteries more Reliable and Longer Lasting
- What causes Lithium-ion to die?
- Safety of Lithium-ion Batteries
- Recognizing Battery Capacity as the Missing Link
- Managing Batteries for Warehouse Logistics
- Caring for your Starter Battery
- Giving Batteries a Second Life
- How to Make Batteries in Medical Devices More Reliable
- Possible Solutions for the Battery Problem on the Boeing 787
- Impedance Spectroscopy Checks Battery Capacity in 15 Seconds
- How to Improve the Battery Fuel Gauge
- Examining Loading Characteristics on Primary and Secondary Batteries
- Change-log of “Batteries in a Portable World,” 4th edition: Chapters 1 - 3
- Change-log of “Batteries in a Portable World,” 4th edition: Chapters 4 - 10
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Amazing Value of a Battery
Information
Learning Tools
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Batteries in a Portable World
Comments
It is generally safer to remove and replace the battery when the computer is turned off, but as long as the computer is plugged in there should be no major problems.
me 2 .. i still remove the battery while laptop is running .
& i think that is good way ,, isn’t it ?
What does 80% depth of charge mean? Should I charge until 80% then use, or should I charge to 100% and then use until 80% then recharge?
That’s “80% depth-of-discharge”, DIScharge, not charge. Thank you,
Thanks, these are helpful information:) But what about Li-Polymer batteries, how to charge them?
@Michal - LiPo charging rules follow the Li-ion column.
should we use laptops with only charged battery power or run laptops with direct powers along with batteries to ensure more life for batteries.
Thanks….btw does using the battery while charging ‘drain’ the battery????
eg.talking on mobile phone while charging….
Sometimes battery-powered devices use battery power even they are charging, so they “drain” batteries when charging.
Some don’t, they use external power source such as power from the charger, then these kinda devices don’t “drain” batteries when charging.
“Sometimes battery-powered devices use battery power “
I mean devices that always powered by battery power when charging.
oow…..thanx…
Is it OK to recharge a Li-ion battery immediately after use? While it’s still warm? I remember that was the case with NiCd batteries when racing RC cars.
Craig, if you do not need to use the device immediately, it would be very kind of you to let it cool down before charging.
While charging any kond of batteries, it will warm up or heat up, so you guys need to do something to cool them down.
nitin, there are a few circumstances:
If the AC incoming power are stable where you work at with the laptop, you can discharge your battery to 30~40% power left by using the power of the batt., then put the batt. away your laptop to storage them;
If the AC incoming power are quite not stable, or there’s a scheduled power off where you work at, you’d better keep them in the laptop. That’s because you may / will need them any minute.
how much battery charge level should be left off in battery when not using laptop battery for 1 or 2 weeks or i mean instead of using battery i use external power. will this help in maintain long life of a laptop battery? i mean to say put battery into laptop when u away from power source.
plz tell if using laptop without battery affect’s its performance?
is it the good practice?
also please tell is it good to perform full recharge cycle in cell phone batteries with 1500 mah capacities or lower???
how often should we charge cell phone batteries for their long life and performance?
Regarding partial charging a Li based battery:
In Radio Control applications the “LVC” (low voltage cutoff) is often based on the voltage of the pack when it is plugged in. Thus a partially charged pack can result in excessively low cut-off which will damage the battery. Always fully charge a battery used to power a radio controlled model.
Also note that LiPo is easier to damage through improper charging or over-discharging than Lion or LiFe/LiFePO4. Thus this page needs updating and separate columns for the different types of Lithium based cells… or a separate page just for Li based cells.
My laptop has an option to turn off the battery charger while remaining plugged in (and operating).
While I understand removing the battery is the best way to prolong life, I prefer to keep my battery in the laptop so I don’t lose work in case of a power glitch or failure. Each time I start my computer, it reminds me my battery is not being charged and tells me how much charge is left. In two weeks, it has already dropped to 88% charge and my computer is brand new.
My question is, if I want to prolong the batteries life, at what charge level should I turn the charger back on? How long would you expect it to take to reach that charge level?
Does brand matter in terms of battery/charger interaction?
I need to buy a charger for a CRV3 battery, and I was wondering if there is a problem charging generic batteries with a Kodak charger and vice versa.
is it okay to use laptop directly from AC power? is there any downside other than there’s a scheduled power off
is it right that removing the battery is the best way to prolong life??
“apply some charge after a full discharge”
so what should I do? discharge until 20%, then plug in the A/C immediately and countinue using, or shut down, let it cool, then charge?
i like that web ,it has been answered my question thanks a lot
I have one question which I would like some assistance on:
My camera uses a battrey NB-4L, 3.7V, 760mAh(Li-on). Now I would like to replace the battrey as the lifetime of the battrey has become too short.
Would a battrey with a higher capacity [NB 4L, 3.7V 900mAh (lion)] be used on the camera or will it damage the camera (if it works at all cause I have no idea). I would appreciate if someone could kindly advice on this. Thanks in advance!
I have the same question as Glorianne too.
My camera uses the battery NB-4L, 3.7V, 760mAh(Li-on). If I use a higher capacity battery, NB 4L, 3.7V 900mAh (lion)] - will it damage the camera?
Thanks.
I have few quetions on charging cell phone batteries. Is it gppd tp keep unplugging and plugging back in the phone while it is being charged? (like to move it to different spot) or should you plug it in and leave it untill it is fully charged.
Is it good for the battery to just charge it for few minutes at a time, just enough to last short bit. (battery is low so charge for 30 min to get some charge on it, then keep doing that over and over.)
To Randi James
Sometimes battery-powered devices use battery power even they are charging, so they “drain” batteries when charging.
Some don’t, they use external power source such as power from the charger, then these kinda devices don’t “drain” batteries when charging.
“Sometimes battery-powered devices use battery power “
I mean devices that always powered by battery power when charging.
Hi, just got a new camera with li-ion battery and was wondering if i should charge it before i use it (and if so, then for how long) even though it says it’s fully charged? I remember having to charge cell phone batteries for many numbers of hours before use in the past.
To Lola:
The Li-ion battery?If the power is not full, just charge it. When it’s full, ordinarily it would stop charging. See the table atop for deails.
I read somewhere if I have a chance to charge the Li-Ion battery, I should just do it. So for those batteries basically always leave them on the charger?
So, I have a Dell laptop with Li-Ion that I got last year. I have a 6 cell and 9 cell battery. Should I keep my battery constantly charging or should I go to 100% and unplug it and then charge it again when it says battery is low or maybe half way?
Is it the same for my Droid 3 phone Li-ion battery? I charge it every night and it doesn’t get below 50%, 40% or 30% rarely.
My UL V-2833 Class 2 Battery Charger does not work (or, at least the charging lights don’t turn on), and I never even used it once! I put the batteries in the unit in pairs, like the instructions say.
However, when I traveled with it, I stored the batteries in the unit itself, unplugged of course. My question is—can storing rechargable batteries in the unplugged recharging unit cause it to break? That’s the only explanation I can summon, other than faulty mechanics.
I use acer inspire 5516…my uncle gave it 2 me.
The battery take an hour to get fuly chargd(dn’t knw if its geting weak). wen its ful i stil leave it on AC til i’m tru.
Wen i unplug it, i use d main battry to 20%.
Is it advicable?
i bought laptop hp dv5 before 3 years ago ,so right now during using the lap top an alarm comeing talking about that my battrery should be replacement ,and befor i were recharging in when it need that ,otherwise i were used it without pluging.so could you guide me to the right way.
thanks
I bought 2900mAh AA batteries and a 200mA charger. After 8 hours the led’s on the charger go off and it switches to a trickle charge. When I do the math it says they need to charge for 17 hours. Do I reset the charger to charge through another 8 hour cycle or do I let it continue on the trickle charge for the remaining time?
Thanks
Can anyone answer my question ? I am wondering how the temperature is affecting the internal resistance of the battery. I know that a lower temperature will raise the internal resistance and vice versa.
My question is more the “by how much” part. For instance, at 25°C, the internal resistance of my lead acid 12V 16AH battery is 4mH. What will be the internal resistance of that battery at -40°C ?
Pretty sure it depends on the battery’s manufacturer but is there any way to estimate this value other then testing at -40°C ?
i still can’t find out how to charge my lithium battery for the first time?some of my friend told me to charge it 12 hours and some others say just charge it for 3 hours?how could i know what’s best for the first time?
is it possible to charge a battery using micro wave?
we ordered Stationary Industrial Single cell Vented Type Lead Acid (VTLA) batteries 900 AH. Since the standard procedure in shipping VTLA is in dry charged condition and when we received the shipment it is already filled-up with electrolyte solution from the factory (France) and delivered here in Philippines. Upon inspection of the batteries we found formation of white powder at the bottom of the plastic casing. Does this indicate that the batteries are old stock?....have been in stock with electrolyte for months… we are using 48VDC for our Repeater sites and this is the first delivery (replacement of of our old batteries) consisting of 96 sites. Question >>> Do we have to accept or reject said said shipment ?
Why mobile battery is of rating 3.7 v?
is it uk if you used your netbook full without unplugging then used it? ahm,. i unplugged it after using.
di kaya maless ang capacity of that?? while using it then it is fully chareg??
VTLA or Vented Type Lead Acid battery should be delivered DRY CHARGE. Since you will transport it to other place I think you need to get clearance to concerned environmental agencies of the countries where it will be delivered. It is the standard procedure to make sure that the batteries are brand new and not second hand. There will be no basis for the end user to know that the batteries have been stored for a long time.
Can you tell me what kind of battert is in a lap top.Lead acid,Nickel based or Lithium? its a new hp. thanks teresa
There are some questions here that were not being answered. The msot common question is “Is it OK to use the charger while still the battery is connected and being USED”?. Well, for me, just a piece of an advice, let the notebook charge battery while you are using it, even if it is fully charged. That is if the battery is Li-Ion. That’s one of the features Li-Ion has compare to those NimH or NicAD. That is how I prolonged my battery from my Toshiba for almost 3 years now, going 4 years.
Don’t ever use direct power to your laptop if your battery removed from laptop. If the house electricity sudden off, it will give damage to laptop motherboard. My last laptop is useless now because the motherboard is not functional now. It was because i only use direct power, and when the electricity suddenly shut down, it also shut my laptop. then when i open it back, the motherboard crash.
is it ok to charge phone battery using the universal charger, the one that charges the battery out of the phone? And can i connect a charger direct to the back of my phone if my phone no longer charges thru the port? Thanx gguys
What’s the danger of leaving my camera still charging if it’s already fully charged.
PS:It still works but I cannot upload photos to my laptop anymore :/
Please help me!
If someone overfilled the sealed Ni-Cd batteries,what are the danger may be there?
after given freshening charge of Ni-Cd battery always taken 10 amp current why???
sir,
please explain me weather i should keep charging my laptop while using it or remove it once it is charged
Sir, Can I always Use my Laptop on AC power, after removing my Exhausted Battery? Will it make any harm to my Laptop? Pls advise
Hi my laptop charger was damaged about two weeks ago and the charge on my laptop was completely gone I finanly found the same charger it’s been nearly 12 hours since iv been charging my laptop and it still does not turn on how long would I have to charge it my laptop has been dead for about two weeks now. Thanks
I want to charge a battery which is being used by a DC motor at the same time
What should be my precautions?
And will the polarity of the mOtor be reverse too in case of charging?
At what voltage should i charge the battery of 12 volts
If its a normal acid water battery?
Is it safe to charge a smartphone while it is in an Otterbox case? I have heard that will cause excessive heat which will damage the battery or shorten its lifespan?
Thanks for your help..
The following advice is in a portable radio users manual. The batteries are Ni Mh which do not have memory effect so why discharge to condition and does constant trickle charge age battery?
• Leaving the battery on charge
You can leave a battery/radio in the charger once charging is
complete. Leaving a battery in the charger will not
overcharge or damage it.
You can remove a battery/radio from the charger at any time
without harming the battery, the radio, or the charger.
When you return the battery/radio to the charger, charging
is automatically resumed.
• Conditioning NiMH batteries
‘Condition’ a NiMH battery every three months to extend its
shift life. Conditioning enables a battery to hold its charge
for longer.
To condition a NiMH battery:
■ Leave the radio switched on and ignore the ‘low battery’
warnings from the radio.
When the radio switches itself off, the battery is fully
discharged and ready to be recharged.
in the beginning of this year, my laptop battery used to stay for up to 2 hrs. now, in Oct, it barely lasts up to 55mins. please, give me some practical tips on the use of batteries, especially for laptops and torchlights, to ensure their long life.
should the charger be connected even if battery is fully charged?
I find it article very awesome, but Its kinda confusing to me.
The other article was saying that we might avoid keep batteries on cradle charging when it gets full charged for keeping it away from parasite cycles or mini cycles.
But here you said for li-io “battery can
stay in charger”.
So what is the real, I can keep it on dock or travel charger while using it or no?
Consider LI-IO and LI-PO battery for this.
Is it bad if I keep my Mac laptop always charged? (Like it’s always connected to its charger) Does it drain from the main battery life after awhile or would you just use the electricity coming from the charger?
No its aafe to keep ur mac book charged
All laptops have an internal tripper that will turn off caharging to the battery automatically when full
And yes when the charger is connected the battery wil not drain
It will use power from charger
hello, just wanna ask, I have just bought new mobile phone with new battery, and after a week, I couldn’t charge it to full (100%), it would start charging slowly after 90%, not even 1% per hour, is it normal? or should I get new batteries?
I did read that for Li-ion battery it would be best to not charge fully, simply wonder if my battery is broken or something
I’ve a buildin battery notebook can I leave it pluggin when using?
is it advisable to charge the battery of android mobiles using data cable connecting to a laptop or PC without directly connecting to AC power supply.
Renjith
It really doesnt matter
Becoz if u read the instuctions from ur ac charger
U will see that both ac charge abd the usb port of ur pc gives out 5V dc
It is advisable to use ur pc usb port as a charger if u have fluctuating AC supply at ur home
So I have started making pouch cell batteries and am having issues charging them. I put the electrolyte in (glove box) and then do the final seal. I connect it to a battery analyzer and set it to cycle (formation?). But it only gain capacity on constant voltage charging, and when it’s on either constant current charge/discharge, it immediately stops and goes to the next step. What could be going wrong?
Thanks!
What quantity of water is damaged if I dispose a battery there?
If u disposed a battery in water then the ph of water goes towards 0 but the solution is very dilute so in short no much harm done
Is it good to play games or use the laptop while charging the battery ....plz help me ....!!!!
NI-CAD
avoid full discharges?
If you only kill it 50%, then charge it, thats how you end up with memory.
I have always been told run a nicad until its DEAD DEAD DEAD otherwise you will develop a memory
Is it trure that charging your cell phone while making a call could cause your device to explode?
Hello,
I have a car battery for home use, 12V 55 Ah, attached to it are LED for room lighting and a ADSL router to access the internet.
My question, can I keep the charger always attached to the battery in order to charge it whenever the 220V is available OR that is not good for the battery?
Best regards.
Yes u an leave the charging on if the battery is not dry battery and the charger isnt available all the time but i recommend u buy a 12 v over charge protection kit or u can make it urself
Its really easy and cheap to buy or build
Buy a trickle charger if u do so
Hi,
The discussion here was very useful as I got new laptpo which has Lithium Ion Battery. I have gone through all the comments while I got most of the answer but I did not find the exact answer to suit my needs, here is my concern can you please let me know how to handle this situation?
I work on Laptop most of the times from Home, there isn’t power issue however the power oges off all the sudden without any notice as there are unschedule power cuts. Now as I use laptop most of the times it is ok to keep the AC Power plugged in whlile Battery inside? If yes then shoudl I keep discharging Battery manually by switching off power? Please let me know how to handle this situation?
1) Keep working with AC Power on for continously for a month and then discrhage the battery fully and then continue or
2) Keep working with AC Power and keep discharging the batter partially everyday? and then again continue AC power?
Just guide me on this, this would be a very valuable help for me.
U cab keep the ac charging on at all times when available. Ur laptop battery will however go down after 3 years…. No worries
Just avoid fast discharge/drainage of battery
Thanks,
So you mean no need to keep the battery discharge at frequent intervals? So you mean even if we try to discharge it regularly the Batterly life lasts for only 3 years?
Also, just confused with your comment “Just avoid fast discharge/drainage of battery”, do you mean I should not discharge it completely?
i meant that you can keep the charging of the laptop ON whenever u have AC supply at ease
these lithium ion batteries have charging cycles which best work when the battery is charged slowly, charged above 90%, used till below 20% (or even 10%)...never fully discharge the battery
what i meant with fast discharge was that when the charger is not available dont play heavy games or run heavy softwares that drain the battery very fast
in short, fast charging and fast discharging is harmful for battery
and these laptop batteries will last upto 3 years atmost with full care
Thanks for your help, it was really helpful for me to have my new Laptop Battery understand and how to maintain.
Need an advice. I am using my android phone 3.5 hrs straight game leaving 15%-20% juice. after that i charged it to 100% always. Then after fully charged, rest for 10 mins and then play again straight 3.5hrs. In other words, i am charging my phone twice a day. is that okay? Thanks in advance.
Well it is harmful for ur fone battery (this fast charging and fast discharging) because ur battery has a limited number of cycles and according to u that u are using 2 cycles per day
However its not that big of a deal coz phone batteries are cheap
Ur welcome
Well ...after reading the entire discussion being a noob I was able to understand most of the things clearly but some doubts remains still unclear
1.without any sort of repititive answers plz tell me should I fully charge my dell inspiron notebook everytime time I put it on charge(I asked this because it is written above that full cycles are not required)....also if I dont have any problems related to how much time is taken for full charge.
2.i have read at most sites that li-ion batteries have fixed no. Of charge cycles so if I just charge it randomly wouldn’t its cycles be reduced…on the contrary to which full charge cycles will increase life( i mean chrging when battery is about 20% untill its fully charged every time).
3.also while perForming heavy tasks the laptop gets heated hence affecting battery..so please suggest some techniques so I can easily do heavy-TasKiNg《●)....And also doesn’t affect my battery.
4.pLEase do answers my 1. And 2. Queries. ..as tgey r the most important ones.
5.And…is it ok if I use my laptop in between charging. ....
A big thanx in advance to all the guys and girls involved in this site….
short and to the point ans to your questions:P
being an electrical engineer and programmer
1.ans: u can fully charge ur laptop, it will be off no harm to the battery
2 ans: yes there are fixed no. of cycles (about 3000+ cycles) but its no absolute rocket science that u are using ur cycles when charging randomly, but in short u r upto some extent.
3 ans: i have an inspiron 1545, an inspiron n4050 and a inspiron 14r5421 so there is no way to decrease the heat if u r performing heavy operations. just be careful not to block the fan
4. i hope i did answer upto ur level
5.its 100% ok using laptop while charging or while fully charged
Thanx again zeeshan…
And tess I remember askin same questions fron diff. People and always get different answers so…can u tell me what should be battery backup after full charge(I have dell inspiron 3542 4cell 40w battery).it gives about 4hours till its down from 100to20% after im continuously plaing movies….
well i have a doubt about ur 4cell battery coz there are normally 6, 9 or 12 cell batteries in all laptops
u have mistaken the 6 for 4 cell i assume
however thats great timing
becoz my inspiron is a corei5 touch screen and goes 4.5hours max on VLC player on movies
I might have but just checked full specs on dell support and it says 4c battery…so
well i checked also
ur rite
the timing is great by the way
hi. i have a lenovo g510. i didnt charge it for 12 hours the first time i used it.so now, battery work for about 2.30 hours when it supposed to work for 4.30 hours (for medium use). now that i charged it for several time (when it was 30% or lower) is it ok to chrge it for 12 hours?
thanks
Forget about the charging history now
Just charge it till the battery is full
And use it
Will work just fine
Thanks. But i did it as you said and problem is it didnt work more than 2.30
Then u should contact the manufcturer if the problem still prevails
Coz 4 cell batteries are also v.gud indeed
Hi, I have read conflicting advices on battery care and would like to seek clarification. I am using Lenovo X1 Carbon and mostly work from home and office with a stable power supply. You mentioned earlier in the comments that it is not harmful to the battery to leave the charger on while using the laptop and allowing the battery to remain fully charged. (Is this okay in the long run eg, constant usage with the charger on for 8 hours a day?)
Also, I read from other sites that it is better to leave the battery with 40% - 80% charge (ie charge till 80%, unplug the charger and charge again at 40%) Is long term partial discharge harmful to the battery?
Please advise which method is better for the battery or let me know if you have other recommendations. Thank you so much!
Old laptops had this problem that if u leave them on power, they would ruin the battery
But these new machines have a very efficient over charge protection system
Now i know its true that the 80-40% story is true and is 90-20% to be exact.
But i advise u the best possible way of applicable solution that is
U use the laptop while on charging normally, and must discharge it fully below 10% once a month to keep ur battery healthy.
Thank u
I hv a question please.
Can I use dell laptop with plugging in charger always? Is there any problem in battery? Thanks
no there is no problem in it
Is this applicable to android batteries?
i have a new laptop and i charged it less than 5 hours on first charge, is it bad? what should i do?
I have a 12volts deep cycle battery that charges up to 11.59 volts. What could be the problem.
I have a quick question. Can batteries that are connected in series but not connected to a load create a fire hazard or some sort danger? I know the cells will continue to deteriorate without a charge but I just want to know if there is the potential for a larger problem that I am not seeing?
Why is that a battery should not charge in a dark room?
to edison:
never heard of such a thing
to jeremy:
no particular danger other than the series connected batteries could have a very large added up voltage
to jessa:
modern laptops are equiped with charge controlled circuits so no problem
to ish:
same for all lithium ion batteries
My phonez battery is shot (as in very slow charge and fast dieng) I have a HTC one m7, i tripled the damage yestarday by my using a faulty wire it was rapidly charging then not, charging then not. Ever since this catastrophe my phone no loner charges fast with my other chargers. What do I do to fix the battery?
Can I use my laptop while charging?
or is it better to shut it down until it finishes charging then use it?!
I have some questions although i got some of my answers..
1.Which one’s better??
If i charge my DELL laptop to 100% and then plug out and work till 20% OR I keep on charging it even after 100% and use it..
2.does full charging the battery cause damage to the battery??
3.Is it good to charge my battery when it’s 20% or 50%??
Thanks in advance…
Hi there. I have an ASUS K455L laptop which I have bought last December. It has a built-in battery. I am an active gamer, so with that, I would like to ask (I HOPE I GET ANSWERS) if should I leave my laptop plugged in when playing games? What I currently do is that I charge my laptop up to 80% (sometimes full) and then unplug it. Then when it reaches < 30%, I plug it once again and wait for it to charge back to 80%. Am I doing it right?
Please I hope I get replies to my question.
We recently took our Asus laptop with us to my brother-in-law’s house in Iowa. We live in Nebraska. One thing my husband and I both noticed is that even though we were using it without the cord, the screen did not dim like it does when it’s not plugged at home, AND the battery lasted for hours. The low battery light comes on after only a few minutes when we use it just off the battery at home. Because of these two things, we rarely use it at home without plugging it in. As soon as we unplug it, the screen dims. Just curious as to why the battery lasted so long at our brother-in-law’s and why the screen stayed bright without it being plugged in there. Any ideas on this?
I bought a new Asus 202s notebook, can I use it connected to AC even it’s battery is full charged? Can I use my notebook by connecting it always in AC even it is charging? will it be bad effective if I use my notebook keeping it connected in AC always,, Thnx in Advance.
i have acer pc that not more than 30 minuets how i control it
Just bought a new replacement battery for hp laptop. Lithium. Anyone know the protocol for charging replacement batteries?
I didn’t do to well on the original battery.
Thanks
They say that it is better not to use the battery while it is recharging. How much it helps with how many charge cycles battery lasts if you always turn off your mobile phone while it is recharging?
Hi there,
After various trial, Surprisingly, the power bank reached full charge (i.e. the LED light turned white) only twice. In the two times it was not connected directly to power outlet but rather through USB of a TV or CPU of desktop PC.
These two options are not easily available on a trip or hotels and in so many countries the power outlet is 110.
So please advise what can I do taking into consideration that my power bank is newly bought.
I am fitting an LED module to an outside burglar alarm to give an operating display usually running on a 9v alkaline PP9. I want to power from a 9v DC mains adapter but would like to strap a 9v rechargeble across it to cover the event of mains failure. The adapter has settings and I can set it almost on 9v but for a few mV. Would it be ok to leave this arrangement in place?
I have a question. will a cheap charging pack for iphone 5 effect the battery life like “pocket juice”. I searched every where but i did’nt find the answer thanks.
Is it possible to used UPS to charge or extent time for 2hr, for my rechargeable Fan when light goes off at night


I still have a doubt here, It’s safety or not to the battery if I remove it from the laptop while it’s running? Or I need to turn off the laptop in order to remove the battery?
Thanks!