yashsingh1/xdaforums huggingface dataset:
[General Accessories] Terghan:
This is actually very useful information for me. So let me get this straight. Are you suggesting that overcharging is either not likely or altogether impossible? I dont usually like to leave my phone plugged up over-night while I sleep, as I am afraid that it will 'over-charge'. If this is not an issue, then I will quite literally sleep better knowing that.
[General Accessories] Xenova:
Please ignore this. Double post.
[General Accessories] Xenova:
That's why it is important to use original battery + charger because they are designed to stop smartly when the battery is full (my case, it will always stop at 4.199 as 4.2 is full capacity).

Not recommend to use those "universal charger" because the charger won't know what is the max capacity and dunno when to stop charge. That will lead to overcharge.

So, no worry mate. If you charge using proper charger or charge using your phone then everthing is juz fine. You can sleep soundly.:D
[General Accessories] albling:
Thank you for the useful guide. Your tip #1 strikes home real good. Always seems to forget about battery deterioration over time..
[General Accessories] raven198:
Thanks for the post, I learn a good bit about the battery for it.
[General Accessories] FeelMyMagic:
Well, yes. Chargers are usually able to determine the voltage of the battery and do cut-off when the battery has reached it's capacity. Without this cut-off feature, batteries would very well explode.

Xenova is right about using the OEM battery and charger, they have been designed specifically and often exclusively for your phone. Mileage may very with "universal" chargers and third-party batteries.

:p
[General Accessories] JuanDeaux:
Thanks for this I was able to forward it to alot of people
[General Accessories] duanxiaotao:
Nice read. Thanks!

Now I don't need to worry about charging my phone all day :D
[General Accessories] mprou:
The sad thing that I come across everytime I go to buy a lithium battery device is the ignorrance of the sellers who give advice on your battery maintance like we were 15 years ago on NiCad batteries
[General Accessories] Anu6is:
Thanks... never new full charge was bad.
[General Accessories] ricky babalu:
Thanks, nice read.
[General Accessories] zxcplayer:
Wow new lesson, thank you:rolleyes:
[General Accessories] Wakahoola:
Quiet a lot info, considering that it's just a battery :D Thanks alot
[General Accessories] silverwolfx10:
Nice, Don't know
[General Accessories] ultradie:
Wow, excellent thread.
[General Accessories] c9h9no3:
Good write up, wasn't aware of some of that information. I actually do buy batteries for my HTC EVO from China. They are a great deal, and helping last that much longer is even more beneficial.
[General Accessories] ks3769:
brilliant. this is a lot of information
[General Accessories] amin12345:
good post learned a lot thx
[General Accessories] Kaiorga:
Hot car = bad
[General Accessories] khaotickat:
informative post!

thanks!
[General Accessories] imdevender:
Cool. Didn't knew these facts
[General Accessories] javideslomao:
Thanks for the info.
[General Accessories] rodrigoratan:
Can I leave my Smartphone plugged in the AC charger while I'm at my work desk?
[General Accessories] AdamiX:
Thank you!

This one (Constantly recharging a lithium ion battery does not shorten the battery life) helps a lot
[General Accessories] mysylence:
Nice to know that just recharging the battery at whatever level it's at doesn't do any more or less damage than usual.

Wanted to mention that I had a Verizon Rep tell me that I should unplug the charger once it had reached 100% or I would be damaging the battery on my new DX. I've been fairly consistent with that behavior (thanks to Tasker playing a little chime whenever the batts full) but my roommate just plugs his DX in at night and unplugs it the next morning before leaving for work. A year later and neither of us have any problems with battery life but I wonder if my diligence means my battery's overall lifespan will be longer??
[General Accessories] xninj4:
Thanks for sharing this!
[General Accessories] MrWall:
great article, I am now forwarding it to a few friends who look at me like I have 2 heads when I try to explain to them these exact same things.
[General Accessories] HunnyBearLewis:
Hey thank you for making this post. I will definitely be hitting the thanks button and referring others to this.
[General Accessories] osaeed:
Now this is what you call a person who has done his research properly and knows what he is talking about.

Thank you! :)
[General Accessories] evereste:
my goodness, a little melodramatic aren't we LOL... Hell, batteries are pretty cheap these days, if you're counting cells and percentages, you might need a beer...
[General Accessories] Dat Kid Named...:
nice info. Thanks!
[General Accessories] philippecr:
You should point out the "first time 8 hrs wake up charge" myth too. :)

Li-ion battery doesn't need one!
[General Accessories] smbuddy:
And all the above also applies to Li-Pol batteries?
[General Accessories] euphoria47:
Xenova thank you for a very informative and much needed article! I do have one question though:

Not to nitpick, but are these 2 points I have quoted above not a little bit contradictory? The reason I ask is because due to my job I am on the phone (voice calls) for several hours a day, and doing a great deal of browsing, texting, various data transfers, some games etc. I drive a taxi, so I have the car charger right there. My battery cannot and will not last even half a shift, so I have it plugged in. I'd like to leave it plugged in all the time at work because many swings from "charged" to "connect charger" per day will use my charge cycles quickly, 2 or 3 per day. In the above post, these two points suggest keeping it plugged in for hours (or days)at a time is ok, but then in the second half some suggest not keeping it at a full charge as corrosion in what I assume is occurring between/within the cells is going to damage it. Or is this referring to storage in the long term, which is obviously very different?

For the sake of simplicity, in this question let us not factor in the 20-80% charge guideline, as this is a much more refined longevity tactic, than worrying about immediate detriments to having the battery at 100%, plugged in for say, 8-10 hours a day.

On another note, having read up a bit on batteries in the past, I think people are mis-speaking or misunderstanding when talking about calibrating batteries. Li-on batteries are not what we are trying to calibrate. It is the device itself which must be taught what a full charge is in comparison to "empty". Erasing battery stats and going from 0 to 100 (or the reverse) may help the device get it right sooner, but I find it is just a matter of not much time, and fairly normal use.
[General Accessories] bart3385:
I'm going to share my experience. I'm not going to debunk anything or pretend to be an expert. Just plainly my experience.

I bought a high end laptop a decade back. I'm a heavy user of pc. On the first year, i used it normally as it is. Battery always plugged in. When I compute in the office, it stayed plugged to power outlet, with the battery intact. The battery lasted for 8 months, and it died. Meaning, it can hold only a few minutes of charge. Luckily, the whole laptop comes with 2 years warranty, including the batteries. So i had it replaced. No questions asked.

Again, i used it normally like before. Battery always plugged in. When i'm out, use battery power. When on my desk, plugged in for hours. Again, the battery died after 7 or 8 months. I went back to the shop. Replaced with no questions ask.

This time, i was nearing the end of the 2 years warranty. So i thought i'd try something else. This time, I took out the battery whenever i arrived on my desk, and plugged the laptop to the wall.

The battery lasted very long. Up till I got a new laptop 4 more years later. (Total of 6 years. Great Asus quality.) Even after that laptop was decommissioned, the battery still works. Holding the charge practically like brand new. The last i check was 2 more years later. And it's still good.

That laptop has been collecting dust on my cabinet all these years. I'm curious to try it out again one of these days to see if the battery is still good.
[General Accessories] Michun:
Charging/dischargin regimes

I can confirm this. I use an electric toothbrush that has a Li battery built-in. It is 7 years old now and still has roughly 30% of its original capacity. The charging of that device goes very slowly (trickle charging), one brushing take hours to recharge.

It is a known fact that tooth brushes have a long battery life span, and it is mainly due to that aell design charging circuit.
[General Accessories] cosp79:
Very good info.

My previous knowledge about batteries comes from here: http :// batteryuniversity . com/
[General Accessories] Xenova:
Hi euphoria,

Thanks for your feedback. Yes, it sounds contradict. I also just learn the fact that "avoid to keep battery at full charge". I cannot 100% percent confirm its validity. So i put "some claimed".

The statement at point 3 "So leaving the battery in when the AC is on has no detrimental effect whatever on the health of the battery". Cannot be read alone by itself. It actually is to tell that your battery won't get overcharge, because it will stop charging when full, so dont worry about explosion or wat not. Thanks for pointing this out, it is misleading as well (after i addon the new point). I will change it later on.

Yes. the caliberation process talked nowadays is to reset the batterystat.bin file so that the system start to 'learn' the battery state. It is my mistake if i wrote calibrate the battery (cuz i not used to say caliberate the device, it sounds bit weird :p)
[General Accessories] Xenova:
I personally think there is nothing much you should of charging it overnight if you're using OEM charger and batteries. Because they are designed to stop charging when it is fully charged. A guys have did an experiment showed that after the battery reach 100%, the device will cut off the charging and start to use the battery to support it, AC is completed stop. That's why you might notice it drop 100% to 98% or even lower after you unplug it. Because the device has used it. Just remember not to leave you phone charging in a hot environment.
[General Accessories] Xenova:
That's right man. The best is to just use your device as you wish. Don't pay your attention at the percentage. Because the battery is bought to be used. It just like our razor blade. We doesn't think about how to use razor blade (the angle, the strength, temperature, and the moisture) to keep it blade can be used forever.

Same go for the batteries. Just use. As long as there is no adnormal drainage.

Easy to say. But most of us are paranoid :D Just cant stop myself from looking at the battery percentage most of the time :p
[General Accessories] Xenova:
Please refer to this:

http://www.rcgroups.com/forums/showthread.php?t=209187
[General Accessories] 57HotrodVW:
Interesting/good info - thanks for sharing!
[General Accessories] euphoria47:
Actually it isnt your mistake, but everybodys. I still say it too often and that is a term that has made some really jacked up theories come out. Nothing wrong with having battery run down from time to time, in fact if anything, we all get stuck without our charger once in a while.

But what hurts is i read a post about calibrating a battery that says let it run down, ignore the 15% warning, it powers down, then boot into dl/recovery and see how long it lasts there, then finally when the battery wont make it vibrate or have any lights at all fully charge, it is calibrated. In fact I read something to this affect last week, dont remember where.
[General Accessories] rootz666:
A lot of good information. Thank you!
[General Accessories] mumbhai55:
Thanks a lot for explanation
[General Accessories] vetdrchandan:
Very nice information thanks a lot.
[General Accessories] SolBallads:
Thank you dear sir for sharing this piece of knowledge with us common mortals :)

I didn't know half of what you're reffering to here!

Excelent job!!
[General Accessories] sabbath88:
Seems to be very helpful. Thanks Xenova
[General Accessories] Atlasox:
Wow. I'm guilty of doing #3, now I know I shouldn't keep doing that. Thanks, wonderful input!
[General Accessories] Xenova:
Thanks mate. That remind me to add another point about how to store battery for longer period,
[General Accessories] LFSPovo:
Great post! I always thought it's better to fully discharge, before recharging :o
[General Accessories] bbgmp:
Thanks for this. For years I've been very disciplined in ensuring the batteries of my electronics are fully discharged before I charge them. It's a bit sad to know my effort may have actually been wasted.
[General Accessories] maximumreality:
Thanks for the information much appreciated!
[General Accessories] xda1978:
Thank you guys!
[General Accessories] fantobe:
Thanks so much for the tips guys. I have always wanted to ask a expert in battery engineer about all the myths on internet about batteries.
[General Accessories] eternistarr:
That's some good info
[General Accessories] Xenova:
Cheer up, mate. The thanks just an impersonal numbers. I pretty sure if we were helping around, people will appreciate us. For myself, when the others help me here, the only thing i will remember is their Username. Just like you mate, i sincerely feel glad to see you around here, and respect you the bottom of my feeling. And the only thing in my mind is your name^

And it would never be too late to start from now right ;)

Cheers
[General Accessories] matte3560:
Good read! I always thought you should fully discharge your phone, and then fully recharge it to maximize the lifetime of the battery.
[General Accessories] kinox:
Thanks man! This is exactly what I need to hear. Have always worried about over-charging with AC plugged in overnight. :)
[General Accessories] OuT.Law:
thanks m8 :)
[General Accessories] tripster69:
I've a 1st gen HP envy laptop with an i7+ati hd4830. One of the hottest laptops EVER under load, in fact the aluminium underside could probably burn if you tried hard enough.:D

Anyhow, point is I bought this second hand on ebay and the battery life is literally 45 min tops on power save mode with max CPU to %50 and screen dimmed to 0.

Thanks to this thread I now know why and will also be taking the proper precautions to not leave the new battery that i've ordered in the laptop when gaming for hours at home.

Cheers!
[General Accessories] ysabxe:
Thanks? Man!
[General Accessories] alekos100:
Very useful information. Thanks.
[General Accessories] TheGodson:
You can find everything you need to know here:

http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
[General Accessories] didess:
Thanks for this great tip.

Another question I'm wondering about :

Some devices (like SGS ) are blocking the full charge of the battery (or simulating 100%). I've seen that also on laptops that never reach 100%.

For example my Phone in immediatly at 98% charge just after a full charge of 100%

Are those hacks useful to protect the battery ?
[General Accessories] astrovasilis:
Useful! ! ! ! ! ! !
[General Accessories] fly.caca:
Thanks a million.
[General Accessories] Z!GZA!G:
Great post, thank you so much definitely learned many things I never knew.
[General Accessories] iRobby:
thanks for that, I feel alot better about charging my phone after school and before work now :)
[General Accessories] Ser Gilgoroth:
Good info!
[General Accessories] AGiovanni:
Very useful post!! Clear and simple.

Thanks
[General Accessories] jmartino5920:
Thanks for this thread.
[General Accessories] mrrick:
Can someone enlighten me/us on lithium ion battery temps? At what point should a user become worried? What's the optimal operating temp? Etc.. thanks!

Edit: also this thread was very enlightening, thank you.

*insert sig here*
[General Accessories] Xenova:
Well.. my two cents:

the operating temperature highly depend on your surrounding temperature.

In air conditioned room of 20.c my battery temperature when in use can range from 26 to 32, depend on usage. High usage like game can go over 34 to 36.

But in general, don't let your battery go higher than 40 or 43 degree. That will permanently degrade the battery.

When the temperature is high. Let it rest for awhile for cool down.
[General Accessories] denegri44:
Thanks brilliant post
[General Accessories] mrrick:
Thank you Xenova for answering my question. I wish the xda mobile app had a way to use the thanks feature.

*insert sig here*
[General Accessories] themsofian:
My friends never listened to me when I told them removing the laptop battery while on AC is of no benefit !! :P
[General Accessories] Xenova:
I would be happy if you thanks when login using web nextime :p
[General Accessories] CheekyGreek:
So I have a second battery for my phone which I leave plugged into my car's boot cigarette lighter socket. I use it for emergencies when i am out and about and my SGSII has decided to eat all it's battery.

Seeing as I live in Cyprus, where outside temperatures can hit 40 degrees (and in car temps when parked can be double this!), then my backup battery solution is causing serious damage to my battery? Am I right on this?
[General Accessories] okishead:
Thanks for the post!! Useful!
[General Accessories] Xenova:
Yes. Putting battery in a hot car is definitely killing it. If possible put it in your office (if 24 aircon on, like mine).

It is suggested to use the batteries alternatively. Used for 4 days then change to another battery. That's make both of your battery live longer. Like that, you can keep it around 70 percent charged. Then, it really works like a backup battery.
[General Accessories] savir90:
Hey guys

Yesterday was tethering thru wifi, my phone was low on battery...however my phone allowed the battery to drain past its limit...it drained the battery all the way to the point where my battery broke...it does not hold charge, i checked it with a voltage meter and its gone...is there anything i can do? Maybe inject some electricity manually thru the pins? I think the battery is permanently short circuited..thats what the voltage reading led me to belive...any way to revive it?...and its ironic cuz its never happened to me...ive been geeking phones for about 7 years now...i read this thread like a week ago and killed my first battery yesterday..lol
[General Accessories] Xenova:
Sorry to hear that, mate.

To the best of my understanding, there is nothing much you can do (because you said you have tried with voltage meter but with no luck showing the battery is alive). But i still will try to ask around especially my engineer friends. If have any news then directly PM you. But please don't put high expectation on this. Perhaps you can try to look for replacement battery now.
[General Accessories] inktri:
In my experience, my Lithium ion battery has never failed me. Anyone else in a similar position?
[General Accessories] Clemopp:
Same here, don't have a laptop though. I usually charge my phone to full when I sleep. Just want to be safe. Dont care if my battery dies in a year or two. The price is not that high.

Nevertheless this was interesting to read, I'll try to keep my battery from getting empty.
[General Accessories] eikichi13:
Good to know, thanks ...
[General Accessories] Babbar Sher:
is it possible for lithium batter to blow up on you?

and does anyone know what type will be the next battery, because we really need better battery life?
[General Accessories] aumnevergiveup:
for phone it doesn't matter if i charge and forgot to pull out charger.

but my macbook battery swollen :(

i keep it charging while sleeping to download some movie -_-

how's about life cycle on battery?
[General Accessories] cosacee88:
thanks for the info will take that on board :D
[General Accessories] Xenova:
There is a "possibility" that battery can blow off if it is overcharged too much than the capacity it designed to hold. But today's battery (especially those original or branded) they have circuit built-in to prevent overcharged. So it less likely to blowup
[General Accessories] Xenova:
Life cycle is varied by the specification of the product. Generally, Liion battery have 300 to 500 full charge and discharges life cycle. Is that what you ask? Sorry if I misunderstood your question
[General Accessories] Köff:
Is an Li-Ion Akku the best Akku anyone can get for a Device?
[General Accessories] ednacell:
Really good I was always questioning this.
[General Accessories] monsterbug:
thanks for the info...;)
[General Accessories] rustyshack3:
This is true, but you are missing the fact that modern devices will not charge a battery to full capacity and continue providing power to it. There is nothing wrong with charging your device to "100%"
[General Accessories] Aiakio:
Q: What exactly is that, when CurrentWidget says 0mA?
[General Accessories] rustyshack3:
I was referring to what the device calls 100%.
[General Accessories] kingird72:
nice tips, thanks a lot for the information.
[General Accessories] musafir84:
Great post!

PS: Where is the thanks button??
[General Accessories] Xenova:
Mate, you will see it at the bottom of my first post once you log in.
[General Accessories] aumnevergiveup:
thank you

yes thank you :D

so if life cycle exceed the specification, swollen battery are normal?
[General Accessories] kearnychan:
thanks your share
[General Accessories] sii77:
Thx for info
[General Accessories] YetAnother:
Thank you for the info
[General Accessories] Xenova:
Yup, all of my old batteries (used more than the specified cycles) are swollen :)

It about time to change if it's swollen. Cuz we might worry the unstable voltage or malfunction of the battery could somehow cause damage to your beloved device ;)
[General Accessories] dirtynunz:
awesome post plenty of interesting facts that i never knew :)
[General Accessories] vigneshwer.m:
It is also a fact that they tend to last longer once they are warmed up....
[General Accessories] throwawayaccount9500:
good stuff, thanks
[General Accessories] Doomofman:
This was a nicely informative thread... Had often wondered if charging my phone when it was only down 20/30% was bad for it... Seems it's the best thing to do :)
[General Accessories] aumnevergiveup:
oh i see. thank you :D

nice to see a thread like this :D
[General Accessories] Xenova:
Welcome. Good stuffs are meant to be shared :D
[General Accessories] ♠AcE♠:
Tip #3: Take the battery out of your notebook computer when connected to AC helps… not!

wow i just knew this, thanks!
[General Accessories] sii77:
thanx :) :)
[General Accessories] nitrobg:
Kinda common sense, but thanks, I didn't know this about the notebook batteries.
[General Accessories] nickert0n:
Hmmmmmmmmmmmm
[General Accessories] Kinz1980:
This was very useful
[General Accessories] Babbar Sher:
1)Can a battery ever blow up with regular use, like those cheap ones from China?

2)is it safe to use a cheap eBay charger that didn't come with the phone but plugs in and the charge light comes on?
[General Accessories] afsalva:
wow great posts...Thank you for all the info.....
[General Accessories] Jorixine:
Totally agree, we always need to get good advices on how to use the batteries. Most important thing on our devices.
[General Accessories] pdhunt:
Really good advice!
[General Accessories] HTC Bravo:
Really good information, thanks mate
[General Accessories] CostasChem:
Very useful infos. Thanx mate!
[General Accessories] CostasChem:
Is there a way we can check the "live" discharging ratio of our battery?
[General Accessories] uelue11:
great tips .. I will keep them in mind! Great job!

Off-Topic

♠AcE♠ <-- His avatar shows a mirrored swastika :-/
[General Accessories] Soul Train:
i feel dis should be in general somewher not offtopic .yo its soooooooul train!
[General Accessories] xaccers:
As long as it is actually providing 5v and not more, and there are no internal faults causing it to short out, then yes.

The charger is in the phone. What you and everyone else calls a charger is just a power supply.
[General Accessories] airfared:
good info and thread....