Related
I just found this very interesting article, maybe you'll like it too:
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
Short summary:
1. "A partial discharge reduces stress and prolongs battery life. Elevated temperature and high currents also affect cycle life."
2. "Higher charge voltages boost capacity but lower cycle life and compromise safety."
its also suggested that you let your phone go through one complete discharge from 100 - 0% at least once a month.
- also on the heat front mentioned in the OP, i take it that means its best to remove your cover when charging your phone to stop a build up of heat?
You mean taking of the case, like Otterbox?
No, I wouldn't do so because my battery never gets warmer than 26-29 degrees.
Bad would be everything above 30°.
scaryshark said:
its also suggested that you let your phone go through one complete discharge from 100 - 0% at least once a month.
- also on the heat front mentioned in the OP, i take it that means its best to remove your cover when charging your phone to stop a build up of heat?
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Our electronic profs at uni (who actually know what they are talking about) told us to keep the charge between 80% and 30%. Discharging to 0% only harms the battery.
So i'd really like to know where it's suggested that you should discharge to 0% once a month.
btw: This is a quote from the link from the op:
"The smaller the depth of discharge, the longer the battery will last. If at all possible, avoid frequent full discharges and charge more often between uses."
So i'd say that discharging to 0% once a month is nonsense and only harms your battery
I read that a while ago on the iPhone support website and did that for my old 3g, I just kept the practice running when I got my DHD. I guess either Apple is wrong or its only usefull for non-removable batterirs.
Sent from my Desire HD using XDA
That's probably why their batteries died so fast.
gotta voice in here. i've also heard that its optimal to keep your battery in the 80%-30% range. and that its only damaging to fully drain your battery.
but on the flip side, its kinda needed to do a wipe battery stats once in a while, so i can get a better reading of my battery.... was a time when i hadn't done it for ages, and i was at 1% battery while watching a movie for 30 minutes..
so, I recommend at least, to DONT drain your battery.. but if you are getting really off readings on your battery. do the wipe battery stats thing
My DHD battery seems to be getting worse and not holding its charge. as it's almost been 18 months I decided to buy a new OEM battery and I was jus wondering how should I run the 1st few cycles? And how long will it take to reach its optimum capacity? Also will I need to wipe battery stats and calibrate it?
Sent from my HTC Desire HD A9191 using xda premium
AllEyezOnMe said:
My DHD battery seems to be getting worse and not holding its charge. as it's almost been 18 months I decided to buy a new OEM battery and I was jus wondering how should I run the 1st few cycles? And how long will it take to reach its optimum capacity? Also will I need to wipe battery stats and calibrate it?
Sent from my HTC Desire HD A9191 using xda premium
Click to expand...
Click to collapse
No Calibration is a hoax, and battery stats are wiped whenever DHD is unplugged with nearly full charge (link to follow from one of the Android devs, don't have it to hand whilst mobile)
Sent from my Desire HD using Tapatalk
I used to worry about battery, then i purchased two of the cheap Ebay ones for like $3 they each hold about a day worth of juice. let the haters hate on the cheap batteries but it's $3! If they are of lower capacity (which must be miniscule because i can't tell) or they die early who cares. Buy a few of them and be done with it.
Sent from my Desire HD
brad808 said:
Buy a few of them and be done with it.
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Why buy many batteries, when you can have 1 quality item?
Cheap batteries can also be a security risk (exploding cell phones e.g.)
scaryshark said:
its also suggested that you let your phone go through one complete discharge from 100 - 0% at least once a month.
- also on the heat front mentioned in the OP, i take it that means its best to remove your cover when charging your phone to stop a build up of heat?
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how should we go about that? play heaps of games? increase brightness? or do you mean drain it slowly like over a day?
rootingdestroyer said:
how should we go about that? play heaps of games? increase brightness? or do you mean drain it slowly like over a day?
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You shouldn't, draining batteries fully is no longer recommended practice
Sent from my Desire HD using Tapatalk
how to charge a new battery?
I still haven't received an answer to my past post. I've just got a new OEM battery and i wanted to know how should i run the first few cycles? is there a certain amount of time i should charge before i unplug it or do i just treat it as i would with a normal used battery?
AllEyezOnMe said:
I still haven't received an answer to my past post. I've just got a new OEM battery and i wanted to know how should i run the first few cycles? is there a certain amount of time i should charge before i unplug it or do i just treat it as i would with a normal used battery?
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Suggested initial full charging/discharging cycles are ONLY made to train your phone and NOT your battery and in most cases aren't even intended for current android phones.
Those mythical suggestions are often based on facts for non-lithium rechargable batteries.
Nowadays rechargable lithium batteries are often shipped at least half full. So what you can and should do is just use the battery and try keeping it between 30% and 80%. That's all you have to do.
Dlog said:
Suggested initial full charging/discharging cycles are ONLY made to train your phone and NOT your battery and in most cases aren't even intended for current android phones.
Those mythical suggestions are often based on facts for non-lithium rechargable batteries.
Nowadays rechargable lithium batteries are often shipped at least half full. So what you can and should do is just use the battery and try keeping it between 30% and 80%. That's all you have to do.
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So are you saying i shouldn't even charge it to 100% and what about the recommended monthly full charge to complete discharge to calibrate the battery?
Well you can charge it to 100% if you want. That will reset the battery log of your phone, so it can't hurt that much.
But charging it for an extensive amount of time will bring you no good. The charging circuit in your phone and in general the charging circuit used to charge lithium-ion batteries will stop charging once the battery is full. That way it prevents the battery from overcharging. But it also means that charging your phone for any more time than it needs to won't make it run any longer.
The monthly complete discharge is not to calibrate your battery as i've allready stated. It is used by the phone to better estimate how much power your battery can currently hold. So in a sense it's used to calibrate but not the battery itself but the battery statistics in your phone.
The phone knows how much energy the wall-charger provides and can thus determin huch much power is stored in the battery once it hits 100% (or better: reaches it's maximum voltage). If you have a charge from 1% to 100% then the phone can obviously determin the battery's capacity more accurately than if you charge it from 50% to 100%.
/edit:
And yes. If you really want to prolong your batteries life then keep it's charge between 80% and 30%.
But just see to it that the charge is above 30% and you're good.
Dlog said:
Well you can charge it to 100% if you want. That will reset the battery log of your phone, so it can't hurt that much.
But charging it for an extensive amount of time will bring you no good. The charging circuit in your phone and in general the charging circuit used to charge lithium-ion batteries will stop charging once the battery is full. That way it prevents the battery from overcharging. But it also means that charging your phone for any more time than it needs to won't make it run any longer.
The monthly complete discharge is not to calibrate your battery as i've allready stated. It is used by the phone to better estimate how much power your battery can currently hold. So in a sense it's used to calibrate but not the battery itself but the battery statistics in your phone.
The phone knows how much energy the wall-charger provides and can thus determin huch much power is stored in the battery once it hits 100% (or better: reaches it's maximum voltage). If you have a charge from 1% to 100% then the phone can obviously determin the battery's capacity more accurately than if you charge it from 50% to 100%.
/edit:
And yes. If you really want to prolong your batteries life then keep it's charge between 80% and 30%.
But just see to it that the charge is above 30% and you're good.
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Click to collapse
Ok thanks for all the information your help is much appreciated
Dlog said:
The monthly complete discharge is not to calibrate your battery as i've allready stated. It is used by the phone to better estimate how much power your battery can currently hold. So in a sense it's used to calibrate but not the battery itself but the battery statistics in your phone.
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How so? Battery stats is wiped when you unplug the nearly charged phone, so where is this historical data found?
Sent from my Desire HD using Tapatalk
ghostofcain said:
How so? Battery stats is wiped when you unplug the nearly charged phone, so where is this historical data found?
Sent from my Desire HD using Tapatalk
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beats me^^
My point was that the calibration is done for the accuracy of the percentage displayed and not to make your battery hold more energy, regardless of what phone/device you use.
And i'm using Battery Monitor Widget so i tend to mean that when i talk about the "historical data". Because BMW really does tell you to run larger charge cycles to increase accuracy. It however doesn't tell you that constantly running your battery down to 0% will only shorten it's lifetime.
Should I charge it for like 10 hours, then play with it? or you think its ok to just start playing out of the box.
I've heard stories..where you should, and where it's not necessary.
Thanks
lin013190 said:
Should I charge it for like 10 hours, then play with it? or you think its ok to just start playing out of the box.
I've heard stories..where you should, and where it's not necessary.
Thanks
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Mine came nearly full. I just plugged it into charger out of the box and played with it while it was charging
Sent from my Nexus 7 using Tapatalk 2
With any new phone I always play with it till it dies and then plug it in and charge for 8 hours and then power it on and good to go
Sent from my EVO using xda app-developers app
Hmm, I see.:cyclops:
With every electronic gadget using Lithium-ion batteries nowadays, it doesn't really matter how/when you charge it.
Some would argue to make sure to allow a full discharge from a full charge from a battery calibration point of view, so the battery meter is more accurate. It wouldn't affect the health of the battery itself either way.
Things like memory effect doesn't apply to lithium-ion. How often you charge it and how much you charge it (full or partial charge etc.) doesn't affect it much either. The only 2 things that can potential kill a lithium-ion is high temperature and letting it discharge far too low to the point that it cannot be charged up again. Note that all electronic devices will power off way before it even reaches this threshold.
What makaijin says is correct
I had mine a bit of a charge yesterday but it was no where near full.
Used it till it was flat this morning. It's currently on charge and I'm going to leave it till it's full only because I need to stop messing with it and do other things
Sent from my HTC One X using Tapatalk 2
I charged mine for 4 hours before use.
Although it is probably not necessary nowadays, I like to fully discharge the device, then charge it overnight (so it gets back up to 100% and tops off), then cycle it that way 2/3 times, so properly "condition" the battery, as I don't 100% trust the conditioning done before shipping.
Just as a side note, most of the battery conditioning lore is coming from way back in the bad ol' nicad days (probably 1990's), when you HAD to 100% discharge/recharge the battery, and make sure it didn't overcharge or undercharge, else it would not be "conditioned" properly, and it had a permanently reduced max charge. Nowadays, expecially with Lion, it is not necessary, and may even be harmful to fully discharge/recharge cycle EVERY time you use it. The first few times it's probably best to do it to fully condition the battery, but beyond that, it really does nothing.
hanthesolo said:
Although it is probably not necessary nowadays, I like to fully discharge the device, then charge it overnight (so it gets back up to 100% and tops off), then cycle it that way 2/3 times, so properly "condition" the battery, as I don't 100% trust the conditioning done before shipping.
Just as a side note, most of the battery conditioning lore is coming from way back in the bad ol' nicad days (probably 1990's), when you HAD to 100% discharge/recharge the battery, and make sure it didn't overcharge or undercharge, else it would not be "conditioned" properly, and it had a permanently reduced max charge. Nowadays, expecially with Lion, it is not necessary, and may even be harmful to fully discharge/recharge cycle EVERY time you use it. The first few times it's probably best to do it to fully condition the battery, but beyond that, it really does nothing.
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"Conditioning" does not occur with li-on batteries, period. Charging/discharging does absolutely nothing for the life of your battery.
Ifixit shows that the battery inside the Nexus 7 is Lithium Polymer. Does that make a difference in terms of conditioning compared to Li-Ion batteries?
MaxCarnage said:
"Conditioning" does not occur with li-on batteries, period. Charging/discharging does absolutely nothing for the life of your battery.
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Click to collapse
Oh, thanks. I thought that was my being paranoid .
Lithium Polymer batteries are actually worse than Lithium-Ion. Don't take my word for it, but at least with older RC Lipo batteries, fully discharging damages them even more the lithium-ion. I am sure the tablet cuts off way before the danger point, but still something to keep in mind.
Here's the deal- and this has been verified on multiple devices with larger batteries- Your tablet will need to self-calibrate the battery meter/charging to the battery. You can expect things like sketchy battery life and running down very low or completely overnight for the first couple days. Once everything "syncs up", you can take advantage of the full potential of the battery. This happened with my Razr Maxx and it happened on my Nexus 7's first overnight. And, talking to people who have had their Nexus 7's a few days, it's common and expected.
As said, it is NOT the battery conditioning, it is the device calibrating. The battery is pretty big and there's a period of time while the device learns.
I decided to drain the battery all the way and then charge it all the way up. It's charging right now actually, any idea how long it should take to get up to 100%?
Sent from my SAMSUNG-SGH-I777 using xda app-developers app
phoneman09 said:
I decided to drain the battery all the way and then charge it all the way up. It's charging right now actually, any idea how long it should take to get up to 100%?
Sent from my SAMSUNG-SGH-I777 using xda app-developers app
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Not sure but you can always tap the power button to pull up the battery charge animation. It should let you know when it is fully charged.
Sent from my Nexus 7 using Tapatalk 2
Over discharging a Lithium Ion battery can ruin it in a single cycle. Of course any consumer device should shut off before that happens but deep discharges to the shut off point still permanently reduce battery capacity significantly more than shallower discharge cycles.
In simple terms, you'll get significantly more hours of battery use during its lifetime if you only discharge to 50% than 10% or less.
Lithium Ion batteries never need to be "fully discharged" to the device shut off point and as stated above, it isn't "good" for them.
That said, a discharge from fully charged to at or near shutoff let's the device software measure the battery capacity more accurately so you'll get a more accurate battery reading.
Lithium Ion batteries should not be charged at elevated temperatures. If you just watched a two hour movie, let it cool down before charging. A tablet is a nasty place for a battery with the CPU heating it up. Most manufacturers advise not charging at > 85 deg F and 70 deg F is better. A really good charger will measure battery temperature and reduce the max charging rate at elevated temperatures.
Lithium Ion batteries should be stored at 50-70% capacity and not fully charged. That's ~3.7 V per cell. Those of us who use the device a lot on external power would see a lot longer battery life if there was a mode which allowed keeping the battery below 100% while on external power. It seems every manufacturer thinks consumers are too dumb to understand the value of providing it and switching to full charge mode before we run off on battery power.
TP_NC_USER said:
Over discharging a Lithium Ion battery can ruin it in a single cycle. Of course any consumer device should shut off before that happens but deep discharges to the shut off point still permanently reduce battery capacity significantly more than shallower discharge cycles.
In simple terms, you'll get significantly more hours of battery use during its lifetime if you only discharge to 50% than 10% or less.
Lithium Ion batteries never need to be "fully discharged" to the device shut off point and as stated above, it isn't "good" for them.
That said, a discharge from fully charged to at or near shutoff let's the device software measure the battery capacity more accurately so you'll get a more accurate battery reading.
Lithium Ion batteries should not be charged at elevated temperatures. If you just watched a two hour movie, let it cool down before charging. A tablet is a nasty place for a battery with the CPU heating it up. Most manufacturers advise not charging at > 85 deg F and 70 deg F is better. A really good charger will measure battery temperature and reduce the max charging rate at elevated temperatures.
Lithium Ion batteries should be stored at 50-70% capacity and not fully charged. That's ~3.7 V per cell. Those of us who use the device a lot on external power would see a lot longer battery life if there was a mode which allowed keeping the battery below 100% while on external power. It seems every manufacturer thinks consumers are too dumb to understand the value of providing it and switching to full charge mode before we run off on battery power.
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I would rather always have my battery near max charge when I take it off the charger than have a battery last 7 years instead of 3 or 4 in a device I will realistically only use extensively for 2. Even more so with a phone where they battery can replaced for $20. I'll take a full charge every time over the battery lasting for years longer than I need it to.
I have a first gen iPod Touch I bought when they were released (2007 I think?). I have left it on a charger for MONTHS. Still holds a decent charge.
Is there benefit to using a battery calibration app like this if you're rooted?
https://play.google.com/store/apps/details?id=com.nema.batterycalibration&hl=en
You don't have to but I like to. Mine was like 40% charged when I unboxed
Sent from my Nexus 7 using xda app-developers app
sRDennyCrane said:
Here's the deal- and this has been verified on multiple devices with larger batteries- Your tablet will need to self-calibrate the battery meter/charging to the battery. You can expect things like sketchy battery life and running down very low or completely overnight for the first couple days. Once everything "syncs up", you can take advantage of the full potential of the battery. This happened with my Razr Maxx and it happened on my Nexus 7's first overnight. And, talking to people who have had their Nexus 7's a few days, it's common and expected.
As said, it is NOT the battery conditioning, it is the device calibrating. The battery is pretty big and there's a period of time while the device learns.
Click to expand...
Click to collapse
Calibration occurs every time the battery is charged to 100%. It isn't a "first few days" type of thing, it is every single time the battery meter reaches 100%.
I had no choice but to completely charge my N7 (purchased from Office Depot 7/14). When I went to turn it on the first time, I was greeted with small text in the upper left side of the screen that said "show low battery logo" on a completely black screen. No logo...no nothing. Completely blank. Plugged it in, the battery charging logo popped up, fully charged it and it's been working great since.
However, I found it a bit odd as I thought most of these types of devices ship with about a 40% battery charge.
Thoughts?
I have read conflicting articles on increasing the battery life of Lithium-ion batteries (the ones used in Nexus 10). Most of the Lithium ion batteries have a lifespan of 300-400 charge/discharge cycles. From my understanding, this means that it is bad to fully discharge the batteries and then recharge them as it reduces from the above mentioned lifespan and it is better to top-off the battery often as possible.
In fact there was an article that I read on Cnet specifically for the iPad (I'm not allowed to post outside links for some reason, google: "ipad keep plugged in" and the first article in the search result) , where they recommend to keep the iPad plugged-in whenever possible to increase the battery life.
I use my Nexus 10 a lot at house. So, Is it better to keep it plugged-in all that time?
roshanpius said:
I have read conflicting articles on increasing the battery life of Lithium-ion batteries (the ones used in Nexus 10). Most of the Lithium ion batteries have a lifespan of 300-400 charge/discharge cycles. From my understanding, this means that it is bad to fully discharge the batteries and then recharge them as it reduces from the above mentioned lifespan and it is better to top-off the battery often as possible.
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Click to collapse
This is correct.
In fact there was an article that I read on Cnet specifically for the iPad (I'm not allowed to post outside links for some reason, google: "ipad keep plugged in" and the first article in the search result) , where they recommend to keep the iPad plugged-in whenever possible to increase the battery life.
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The life span of LiIon/LiPoly batteries is also reduced when the battery is at or near 100% for a prolonged time. Don't think too much about it, just use the N10 and recharge it often. I usually try to plug it back in around the 70% mark.
It's also quite easy to open up the tablet, you only need a screwdriver and a plastic prying tool and then you can change the battery yourself, if it ever should become necessary (unlikely, unless you plan to use it for ~5 years).
> http://www.powerbookmedic.com/wordpress/2012/11/16/google-nexus-10-take-apart-first-look
i don't care about it... i leave it plugged whenever i can
chances are, those who take "good care" of their battery may end up with 10% more life in 2 years.... and frankly, i couldn't care less about that
not worth the hassle of worrying about batteries anymore
Best practice actually is to drain to 40% and charge up to 80%. Dropping to 90% and charging back up to 100% a bunch is still bad for your battery, as is leaving it plugged in over night when it reached 100% long before you wake up.
EniGmA1987 said:
Best practice actually is to drain to 40% and charge up to 80%. Dropping to 90% and charging back up to 100% a bunch is still bad for your battery, as is leaving it plugged in over night when it reached 100% long before you wake up.
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It stops charging upon reaching 100%.
Its hard to follow those instructions when your out 24 hours a day, or maybe you just want to use your tablet
Don't worry about doing extra stuff.. like the user said I could careless..
Just don't let your device die, charge it once it hit like 15%..
Saying charge your device once it at 70% is like only driving your car for 5miles and putting it back in the garage and walk the rest of the way..
Sent from my Nexus 10 using Tapatalk 2
YoungAceAtlanta said:
Saying charge your device once it at 70% is like only driving your car for 5miles and putting it back in the garage and walk the rest of the way..
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I didn't say you have to do that. If it's possible I recharge early, if not I just use it anyway.
Doesn't really matter too much since the battery can be exchanged rather easily if it ever comes to that.
BoneXDA said:
It stops charging upon reaching 100%.
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Yes, and then it drains a bit and goes back to charging, over and over the rest of the night.
I've read that Li-ion batteries don't like "deep cycles", that is, fully dischanging then fully charging, because this shortens the battery's life. Also that it's not good to have it at 100% for a prolonged time. So it would be best to always have the device partially charged, plugging it if below 50% and unplugging at 90%. When the battery reaches 90% some phones even notify you that "the battery is full, and you can disconnect from charger"
Source: http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
Hi there ,
I have to calibrate my battery and I need to use a way to do it , but I'm not sure what's the best method !
Which way or software do you suggest to solve this issue?
I have to say my tablet isn't root.
Thanks in advance.
"Battery calibration" is a myth. What most people and apps accomplish when they "calibrate the battery" is either wipe or somehow modify the battery stats - this has absolutely nothing to do with the actual battery output or how the system reports the battery output.
The only thing that battery stats are utilized for is an estimated report of an individual app's usage of the battery. Wiping the battery stats (or modifying them) only decreases the accuracy of these estimates.
Read more here
http://forum.xda-developers.com/showthread.php?t=1443108
Sent from my Nexus 7 using XDA Premium HD app
dayv said:
"Battery calibration" is a myth. What most people and apps accomplish when they "calibrate the battery" is either wipe or somehow modify the battery stats - this has absolutely nothing to do with the actual battery output or how the system reports the battery output.
The only thing that battery stats are utilized for is an estimated report of an individual app's usage of the battery. Wiping the battery stats (or modifying them) only decreases the accuracy of these estimates.
Read more here
http://forum.xda-developers.com/showthread.php?t=1443108
Sent from my Nexus 7 using XDA Premium HD app
Click to expand...
Click to collapse
Thanks buddy.
Yes , I got it!
I read some useful articles from http://batteryuniversity.com. I understood that the best way to calibrate the battery is a full discharging , then doing full charge.It should be done once every three months or after 40 partial cycles.
shab_2008 said:
Thanks buddy.
Yes , I got it!
I read some useful articles from http://batteryuniversity.com. I understood that the best way to calibrate the battery is a full discharging , then doing full charge.It should be done once every three months or after 40 partial cycles.
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Click to collapse
The calibration that is being referred to in the articles and papers found at the battery university website is referring to the internal circuitry and controls of the actual battery. The ideas that "full" discharge and subsequent "full" will help improve the accuracy of the reporting of its state of charge to detectable level in a typical cell phone or tablet battery is guess work at best for us the typical end user.
Also the internal circuitry and controls inside these poly lith ion batteries (these circuits help control the rate of charge as well as prevent these batteries from ever actually reaching a true full charge or true complete discharge) is continually improving.
And besides using and charging your battery you have no actual control over the batteries internal circuitry or how it reports its state of charge.
So you can run your battery down low then charge it up to a high charge, but I doubt you will notice much of a difference and you will not have any way of ever knowing if it had any affect on the accuracy the battery's reporting of its state of charge.
And lastly remember if you intentionally practice the full drain and full charge that you will never reach a true full charge (the internal circuitry in the battery will try to prevent this) as your battery would explode in flames first. And the longer you keep your battery at a high charge state the more you will shorten its life span. Also the circuitry in the battery will try prevent you from reaching too low of a charge because if it happened you would not be able to recharge the battery ever again (at least not with any standard ac charger).
So the idea that you or I (or any other typical user) can do anything to improve the calibration (at least anything that can be measured) on our poly lithium ion battery is a myth.
Sent from my Nexus 7 using XDA Premium HD app
dayv said:
The calibration that is being referred to in the articles and papers found at the battery university website is referring to the internal circuitry and controls of the actual battery. The ideas that "full" discharge and subsequent "full" will help improve the accuracy of the reporting of its state of charge to detectable level in a typical cell phone or tablet battery is guess work at best for us the typical end user.
Also the internal circuitry and controls inside these poly lith ion batteries (these circuits help control the rate of charge as well as prevent these batteries from ever actually reaching a true full charge or true complete discharge) is continually improving.
And besides using and charging your battery you have no actual control over the batteries internal circuitry or how it reports its state of charge.
So you can run your battery down low then charge it up to a high charge, but I doubt you will notice much of a difference and you will not have any way of ever knowing if it had any affect on the accuracy the battery's reporting of its state of charge.
And lastly remember if you intentionally practice the full drain and full charge that you will never reach a true full charge (the internal circuitry in the battery will try to prevent this) as your battery would explode in flames first. And the longer you keep your battery at a high charge state the more you will shorten its life span. Also the circuitry in the battery will try prevent you from reaching too low of a charge because if it happened you would not be able to recharge the battery ever again (at least not with any standard ac charger).
So the idea that you or I (or any other typical user) can do anything to improve the calibration (at least anything that can be measured) on our poly lithium ion battery is a myth.
Sent from my Nexus 7 using XDA Premium HD app
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Click to collapse
The right term here probably isn't "calibrate," but "condition". For most modern (LiPo/Lion) batteries, you will want to "break them in" so to speak by performing a few "full" charge cycles (as mentioned, onboard hardware will prevent the battery from really depleting all the way/charging to full capacity). Afterwards, you're generally recommended to perform a full cycle once a month or so. But other than that, the idea that you need to fully discharge a battery from day to day is silly. Any charge level below around 10% (even 20% if you're being conservative) can slightly diminish your overall carrying capacity.
Having it happen once or twice is nothing to write home about though.
Rirere said:
The right term here probably isn't "calibrate," but "condition". For most modern (LiPo/Lion) batteries, you will want to "break them in" so to speak by performing a few "full" charge cycles (as mentioned, onboard hardware will prevent the battery from really depleting all the way/charging to full capacity). Afterwards, you're generally recommended to perform a full cycle once a month or so. But other than that, the idea that you need to fully discharge a battery from day to day is silly. Any charge level below around 10% (even 20% if you're being conservative) can slightly diminish your overall carrying capacity.
Having it happen once or twice is nothing to write home about though.
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In the articles from the website there are discussions about the accuracy of the "state of charge" reporting and some comments were made that the occasional "full drain" and "full charge" would improve the accuracy or "calibrate" the "state of charge" reporting. One article actually recommended once every 40 charge cycles would be good. The only problem with this line of reasoning is that there is no real good way to tell if the battery had actually ever lost any significant accuracy in its own "state of charge" reporting - your battery may maintain a high level of accuracy throughout its entire life cycle and you would never know.
And subsequently while the idea of doing a "full discharge" and "full charge" cycle sounds like a good idea, the truth is there really is no way to know if it had an actual effect or not.
As for conditioning or exercising a battery there is some truth to this in the case of a poly lith ion battery that has been in storage for a while or a battery that has continually drained and charged to almost the exact same levels repeatedly over several cycles. A "full discharge" and "full charge" may speed up the conditioning process, though the typical average use would achieve the same conditioning given enough cycles.
As for the longevity of a battery, high charge states do more to shorten life of a lith ion battery than low charge states. The down side to running the battery low is that once it gets too low it can't be recharged - now there is a safety circuit built in that stops a battery from discharging too low. This is where you battery shuts down and your device turns off. The down side here is that the battery will still slowly lose charge. So if you hit the too low shut off and take too long to start charging the battery you can end up with a battery that is difficult to nearly impossible to recharge.
Sent from my Nexus 7 using XDA Premium HD app
After thinking it through some more I'm doubtful that there is a high occurrence of poly lithium ion batteries failing to accurately detect and report its "state of charge" otherwise there would be a lot more occurrences of these batteries exploding.
The whole purpose of the batteries internal circuitry and controls is to kick in the high charge (and low charge) safety circuits - there is also a safety to keep these batteries from charging to quickly as that could also cause the battery to burst into flames.
If these batteries were to lose the ability to accurately self detect and self report their "state of charge" regularly as often as just 40 charging cycles then there would be a lot more batteries out there that would not know when to kick in their high state of charge safety circuit. Which means there would be a lot more exploding batteries out there.
Since the instances of exploding batteries is rare and becoming rarer, it is evident that the accuracy of these poly lithium ion internal circuitry detection and control is really good and only getting better.
Like I said the whole idea that battery calibration is needed (or even can be done) is just a myth.
Sent from my Nexus 7 using XDA Premium HD app
One of the annoying things about the 6P is the inaccurate battery charge indicator. It would get to 100% and then trickle charge for anywhere from 30-90 minutes more.
It's annoying enough that reviewers have called Google out on it.
http://www.anandtech.com/show/9820/the-google-nexus-6p-review/6
What is worrying is that the battery charge indicator is extremely inaccurate at high charge levels. The device reports 100% much earlier than other devices. In fact there’s still over 2W of power coming into the battery as it reports being fully charged. This goes on for another 40 minutes, representing an actually significant amount of energy representing about 7% of the battery’s true capacity. As such, the Nexus 6P doesn’t receive a good grade in the charge time metric due to its misleading charging indicator behaviour.
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So is there a hack or mod that makes the charge indicator more accurate? (Running the stock ROM but am rooted and have Xposed installed.)
I like to fully charge my 6P so a more accurate indicator would be very helpful.
Thanks!
Perhaps as a side effect of this, when I charge my 6P overnight on an old 2A charger, although it reports reaching 100%, it never resets the battery usage display. This is my normal overnight charge. As a result I can have a week or more of charge/discharge cycles on the graph. It's interesting, but not useful at all. I really wish it would reset the graphs when it hit 100%.
The graph does reset when I use the quick charger that came with the 6P. It also resets correctly when I use the quick charger that I have in the car. Actually, the graphs are normally reset anytime you get over 90% on a charge cycle. Makes no sense that this doesn't happen on a 2A charger.