Something we all know - HTC One X+

We all know that our phone's battery dies at 10~14% itself. (Especially when you charge to full and then use till it dies) Why does this happen?? OR IS IT JUST ME?!

same here

It just does...... Like the LED goes green @90%

sid394 said:
We all know that our phone's battery dies at 10~14% itself. (Especially when you charge to full and then use till it dies) Why does this happen?? OR IS IT JUST ME?!
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At least it's not a software issue that's fixable. The battery percentage is calculated by the voltage provided by the battery, which drops rapidly when battery is almost empty. Depending on age and charging cycles (amongst other things like quality) the battery behaviour may change, so the OS may do some false calculation about battery level. It's hard for me to explain this more precisely, especially in english, but i don't even know if someone here can understand what i just wrote about battery level and voltage (no offense ), so i won't go any further into this. I don't say this is normal for every Li-Ion battery, some bad calculations and/or design choices by the manufacturer may contribute to this too.
I've got a new battery in my device (the third already -.- ) and it doesn't show this behaviour yet, but i know this from the two batteries i had before.

reaper90 said:
At least it's not a software issue that's fixable. The battery percentage is calculated by the voltage provided by the battery, which drops rapidly when battery is almost empty. Depending on age and charging cycles (amongst other things like quality) the battery behaviour may change, so the OS may do some false calculation about battery level. It's hard for me to explain this more precisely, especially in english, but i don't even know if someone here can understand what i just wrote about battery level and voltage (no offense ), so i won't go any further into this. I don't say this is normal for every Li-Ion battery, some bad calculations and/or design choices by the manufacturer may contribute to this too.
I've got a new battery in my device (the third already -.- ) and it doesn't show this behaviour yet, but i know this from the two batteries i had before.
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Makes perfect sense to me. My understanding of it is pretty much what you said. ALL X+ owners have this issue unfortunately.

Lloir said:
Makes perfect sense to me. My understanding of it is pretty much what you said. ALL X+ owners have this issue unfortunately.
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Yeah, but other smartphones do not necessarily show this, so i guess htc just wanted to get the most capacity out of the battery which ends up in voltage dropping too fast at this point, so making exact calculation/prediciton of battery level almost impossible. Other manufacturers/other phones may have a bit more of a "reserve" on low battery level, like phone shuts down at some point before battery is completely empty, which makes it easier and more precise to calculate the right percentage.

Replacing battery helps. I had the same issue and after replacing battery it acts normal. 14%-0% act as other percentages ...
tapatalked

From what I've noticed, the battery level is more accurate when charging up to 100% and not 99%. When I'm stuck at 99% and unplug the charger, for a long time I see battery level at 99% level, which of course isn't true. But if I wait until 100% charged, the battery percent drops quite accurately.
I don't know if software can improve charging, but DU Battery Saver app is supposed to improve charging and showing accurate battery level.

Yeah! Charging upto 100% definitely helps. When I had the habit of charging my phone only upto 90%, after some cycle I had my phone die on me at 40%

Related

[SOLVED] + [BRAINSTORM] Battery Calibration

Just wanted to open up a thread here to see what we can do about battery calibration issues.
Not sure, but I read around that people are getting phone shut downs at the 10%-15% ranges.
When in actual fact it should be somewhere around the 1%-5% range?
Was wondering if there is some possibility in coding the phone to read the battery state better? Thus, eliminating the need for calibrating the battery through tradition means (ie: wiping, charging, etc)
Thoughts?
EDITS:
We've managed to figure out huge boundaries for the battery.
There are currently two ways to get your battery into "learn mode" - which will adjust the values of your battery to accurately reflect it's "age" and mAh tracking. This will lead to a fix for those of you who are currently facing issues with the battery shutting down anytime before the 1% mark.
1st fix:
1) Drain battery
2) Just as the battery hits "Shutting Down", plug in your charger
3) Let the phone power down
4) DO NOT TURN ON THE PHONE
5) Let it charge up overnight or something along the lines of 4-6 hours, which should ensure it will be fully charged
6) Power up, your phone should be calibrated and will now shut off at 1%
2nd fix:
Head over to the Battery Calibration Tool Thread which spawned off from the discussions here!
>> http://forum.xda-developers.com/showthread.php?t=765609
For those who have been following the thread and wonder what your status_reg value mean theloginwithnoname has kindly provided us with some datasheets and translations, which you can get with the following links:
Binary Conversion: http://forum.xda-developers.com/showpost.php?p=8013370&postcount=548
Then refer to Page 25 of the following datasheet: http://datasheets.maxim-ic.com/en/ds/DS2784.pdf
OR you can try out mtw4991's method to get learn mode done with the battery app that's been created out of this brainstorm thread.
The link to his method is > http://forum.xda-developers.com/showpost.php?p=9583271&postcount=340
I began this thread in other to simply find a fix for our current battery % meter. Basically, users (myself included) were having a problem with inaccurate battery % readings. Some N1's would shut down above 1% and this would leave many guessing when the battery would give out.
Needless to say, here at XDA - we managed to find the fixes. ;-)
And of course, we decided to take it to the next level.
How can we now push more out of our batteries?
RogerPodacter and theloginwithnoname have been working endlessly learning and understanding the how the battery registry works and together with dvgrhl they're finalizing a battery mod app which will help the N1 cope with the "learn mode" and changes. So do thank them for the great work they've been pushing out with! =)
They've helped us hammer out all the core details concerning the battery understanding, values, binaries, and we're wading through the mess to push the limits on the batteries (short of blowing them up as usual of course).
Be patient if the app isn't ready yet. And if you're a n00b, please don't mess around with the registry values and such if you have absolutely no idea what you're doing.
No one is gonna give a rat's poopoo if you blow up your phone and set your house on fire and gremlins kidnap your toes.
Peace out.
This thread is and methodology has served its purpose and many of us from this thread have moved on over to the Battery Calibration TOOL thread. The methods still work, but so do the newer methods at the tool thread, which I personally find is much easier and better.
If you'd like to use the manual method, it'll still work.
For those more interested in the newer method and I encourage you to do so - head on over through this link > http://forum.xda-developers.com/showthread.php?t=765609
+1
It happened to me yesterday. I am playing with my phone and I needed to check an important address on Google Maps, so I was thinking "Oh great I still have 9% battery" and then all of a sudden BOOM. It powered off. I mean seriously WHY have those extra 9% if I am never going to use them. So In reality my phone battery is like 80%
100%-(first 10% which drain in like 5-6minutes) - 10% that I never use cause the phone shuts off = 80% BOOOOOOOOOOOOOOOOOO NOT COOL
happened to me on cm 5.0.7.1 about 7% battery
I guess this would be an appropriate time/place to ask this question. I had someone PM me asking how to calibrate their battery and I didn't know if I provided them with the correct response. What I've always done is let the battery drain ALL the way down until it dies~usually about 1% and then fully charge the phone while it is off. Then, let it die down once again on that charge and repeat the charging while the phone is off. Is that the correct way to calibrate the battery or am I taking unneccesary steps?
THATTON said:
I guess this would be an appropriate time/place to ask this question. I had someone PM me asking how to calibrate their battery and I didn't know if I provided them with the correct response. What I've always done is let the battery drain ALL the way down until it dies~usually about 1% and then fully charge the phone while it is off. Then, let it die down once again on that charge and repeat the charging while the phone is off. Is that the correct way to calibrate the battery or am I taking unneccesary steps?
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No idea as well honestly. I've never charged my phone while it's off... so that might be the issue...
But then again, my phone has often turned off at the 10% mark. So that's why I thought I'd get more input here on how we can actually find a way to calibrate our batteries or something.
i have two oem batteries and a dock..Everyday I completely drain the first and swap it out with a fully charged one off the dock and both batteries perform great and never shut down above 1% every single time. So the batteries are always completely drained and then have a slow no stress recharge, maybe this is why mine go to 1%?
chowlala said:
No idea as well honestly. I've never charged my phone while it's off... so that might be the issue...
But then again, my phone has often turned off at the 10% mark. So that's why I thought I'd get more input here on how we can actually find a way to calibrate our batteries or something.
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I notice that if I charge my phone while it is off and take it off about 20 minutes after the light turns green, the discharge rate is MUCH slower than if I charge it while the phone is on. Or, I will charge it while on, let it get to 100%, turn it off and continue to charge until the light turns green again. Either of those two ways give me the best results for battery life.
Doesn't the Li-on type of battery calibrate itself when charged from 0% (or the specified minimum) to 100%?
THATTON said:
I notice that if I charge my phone while it is off and take it off about 20 minutes after the light turns green, the discharge rate is MUCH slower than if I charge it while the phone is on. Or, I will charge it while on, let it get to 100%, turn it off and continue to charge until the light turns green again. Either of those two ways give me the best results for battery life.
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Hmm. Interesting thought. Guess letting it charge to 100 while its on is one thing, then turn it off so it maxes out before daily use. I'll try that tomorrow morning and see.
Stats have been recalibrated to pershoots kernels already. So tomorrow will be a good testing day.
LiOn batteries should NOT be drained completely. It is bad for them. You should simply charge to 100%, turn the phone off, let it continue to charge (you may be at 100% when in OS but not truly 100% to the battery) and then wipe battery stats.
hah2110 said:
LiOn batteries should NOT be drained completely. It is bad for them. You should simply charge to 100%, turn the phone off, let it continue to charge (you may be at 100% when in OS but not truly 100% to the battery) and then wipe battery stats.
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Yeah, the discharge part is actually true. There's more info here bout the batts, but nothing much bout calibration.
http://forum.xda-developers.com/showthread.php?t=669497
chowlala said:
Hmm. Interesting thought. Guess letting it charge to 100 while its on is one thing, then turn it off so it maxes out before daily use. I'll try that tomorrow morning and see.
Stats have been recalibrated to pershoots kernels already. So tomorrow will be a good testing day.
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The biggest thing I noticed right off the bat in doing this was that normally my battery drains from 100% to 90% in less than 30 minutes. After doing what I suggested, I see that my battery discharges much slower from 100% to 90%! Hope it works for you.
My phone was doing that ALL the time. Here's what i did that fixed the issue for me.
1.) Let my phone die as usual.
2.) KEPT IT DEAD... for 1 day
3.) Charged with the phone OFF for 1 day.
4.) Went to RA's recovery as soon as i turned the phone on and reset Battery Settings.
5.) Rebooted and all is well.
I hope this helps someone else.
(My phone would die at 13% EVERY time. It got really annoying when trying to Navigate when i forgot my USB cord for my PowerCup. :< )
And yes i know about the whole not letting Lion Batteries die. When i worked for T-Mobile and the customers would bring in their N1's doing this, every call to HTC this is what they told me to do. (Minus the whole awesome recovery and such). They said letting the battery drain will not hurt the phone as long as it regains 100% charge after the initial drain.
AGAIN. This worked for Me. So im not promising you anything. Plus the batteries are only 25 bucks from Google. And i have 4 extras... Just in case. I would invest in some if i were you. Cause lord knows, were going to do some SERIOUS stuff to our phones. Extra Batts dont hurt.
Lithium batteries don't have memories, that's a leftover idea from the old Nickel Cadmium (NiCad) and NiMh (Nickel Metal-Hydride) days. The idea with Lithium (Ion & Polymer) should pretty much just be charged up whenever. Letting them be drained completely isn't good for them and will reduce their lifespan (reduced mAh) although it won't almost immediately kill them ala lead-acids. Overcharging them via a circuit with a poor cutoff also isn't good for them as they'll heat up, phones or any decent AC charger should stop charging when they hit 100% though.
Probably about the best you can do is charge it to 100%, pull the battery and reboot the phone and then reboot it again. The charge calculation will be based on the rated mAh of the battery which depending on the quality of the battery and the charging system of the device could end up giving you some funny figures. Not much you can do about it though.
I just wanted to say that this link does mention a proper calibration charge, it just does not go into detail.
Item 3 of "General Lithium-Ion Battery (LIBs)Usage":
• Although it is said that LIBs do not have memory, it's not entirely true. LIBs have gauges that monitor performance of cells, and if you do a lot of small charges, it won't let those gauges to monitor a full battery potential, causing an invalid indication of charge level. A complete charge/discharge should be made when battery capacity seems reduced, that will calibrate gauges and they will provide your phone with correct charge level status. A full charge/discharge cycle should be done every 30 (or so) partial charges.
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My assumption of a complete charge/discharge cycle would be:
1. drain battery until the device dies
2. charge the battery to 100%
3. power device on
4. drain battery fully until device dies (no small charges!)
5. charge battery to 100%
This should allow the battery gauges to recalibrate and improve battery capacity.
People seem to be in the dark about lithium ion batteries, how they are charged, and how the device estimates battery charge remaining.
Lithium batteries do not have memory effects, but the phone does keep a file with charge info about the battery; it uses this to estimate charge left and how to charge safely when the device is powered on.
When properly charging a Li-ion battery, the last 10% of the charge should take almost as long as the time it takes to charge from 0 to 90% (well about half as long meaning a full third of the charging time should be going into the last 10% of the charge) Charging with the device off, charges the battery more completely and consistently.
Li-ion battery chargers use a type of charge cycle called constant amp/constant voltage. The battery will be force fed amps until the battery's voltage peaks and it will then be fed a constant voltage. (around the 90% charge mark) During the constant voltage phase, the amps that the battery is taking in will be monitored; as the battery gets closer to full charge the amperage will drop more and more, until it is just a tiny trickle. When it gets to that point, the battery is fully charged. Obviously charging with the device still powered on creates a problem for that type of charging. So the battery can only be charged to the peak voltage, then the charge cycle must stop; as the last 10-15% of the charge can not be completed safely.
It is always good to let a device run until dead and then charge with the device off a couple times when the device is new, and then charge the device from empty while powered off once every couple months. (do not do it too often, as Li-ion batteries prefer to be between 50-80% charge for longer service life) This allows the device to maintain a proper reference data file on the battery and its charge state. this data file is what Android uses to estimate the charge in the battery, if the file is not accurate, the device may power down sooner than it should, or not charge fully to a true 100% state. (peak voltage state when powered on that is)
Also, Li-ion batteries are rated for capacity from a discharged voltage of 3v. So a 1500Mah battery is rated to provide 1500mah of power from fully charged to a final discharged voltage of 3v.
I do not know what the minimum operating voltage of various devices is, but if it is higher than 3v; then the phone must shut down at its min operating voltage and not the 3v needed to get full capacity. My Nexus one shuts off around 3.5v so there is around 25% of the actual rated battery capacity left. (remember what I said about Li-ion batteries liking to be between 50-80%, this left over capacity means that running the battery dead repeatedly is less harmful than if you drained the battery to a true 0% state)
There is also a voltage drop on a battery when under load. So if you are putting a heavy load on the device (like a 3D rendered game heavy gps use) then the battery voltage may drop to below the device’s min voltage. This means that if the phone shuts down during this time, you could probably turn it back on and get a few hours of standby or a few more minutes of light use. This could be another cause for people seeing shut downs when the battery gets around 10%.
The amount of power in a battery is high, especially in Li-ion batteries with their high energy densities. Over charging a Li-ion battery can cause an explosion, literally, that little battery in your phone could remove some fingers. Over discharging is bad as well, as it can start a fire; though like I mentioned above, the cut off voltage is above the 0% state, so that is unlikely here.
Ive proposed this before and got a bit shouted down, but thumbs up if anyone comes up with anything
As i see it, its not a problem with the battery. Its a problem with the battery meter. Since following a regime of deleting my batterystats.bin file, i dont see that issue. Its the same on my g1 as it is on my n1.
This is what i do... when i charge my phone, i charge it until 100%. When it reaches that 100%, i use either use the terminal or root explorer to delete the batterystats.bin file. After which i immediately power off the phone. Now, when its powered off(and still attached to the usb charger) the light should be green. But usually its not! Sometimes it charges up to a full hour longer before it turns green! When it turns green, power the phone back up and enjoy tue extra kick of battery life. Its not actually gaining battery life, its just resetting tue battery meter in the phone. This could only be done with a rooted phone. Oh, i think that this whole innaccurate battery meter thing is a problem with android in general. The meter becomes innaccurate with time. Sometimes extremely innaccurate.
Using the terminal...
su(press enter)
rm /data/system/batterystats.bin(press enter)
Then power off
Wow. Lotsa pewpewz here. Haha.
Again, after all the discussions, seeing that most of us agree the N1 keeps "stock" of how the battery chargers, is there a way for us to check or see how the battery is being calibrated, etc?
Not so much an app to modify the calibration, cuz that'll just be too dangerous, but something more like a tool to monitor it, so we know if it's calibrated right or wrong.
Deleting the batterystats.bin file isnt an app. Its either a script you run to delete it or physically deleting it. And its not dangerous. Ive done it well over a thousand times with my g1 and n1 combined. If you wanted to find out how the calibration work, i guess you could make a copy of your batterstats.bin and read it

Why "deep battery cycling" or "conditioning," is bad for your battery

Why "deep battery cycling" or "conditioning," is bad for your battery
In summary, "conditioning" your battery is only good for calibrating the tools which predict how long your battery will last.
I.e. people seem to be recommending that new phones should be completely discharged a few times and then fully recharged. In some cases, people are recommending that the phones be left discharged for long periods of time before recharging. THIS IS A BAD IDEA AND WILL NOT HELP BATTERY LIFE.
Again, you can do this to calibrate the battery monitor, but this will not help the battery itself.
Here's a quote from wikipedia *since I am a new user I can't directly link but go to en(DOT)wikipedia(DOT)org/wiki/Li-ion_battery
Like many rechargeable batteries, lithium-ion batteries should be charged early and often. However, if they are not used for a long time, they should be brought to a charge level of around 40%–60%
Lithium-ion batteries should not be frequently discharged fully and recharged ("deep-cycled"), but this may be necessary after about every 30th recharge to recalibrate any electronic charge monitor (e.g. a battery meter). This allows the monitoring electronics to more accurately estimate battery charge.[27] This has nothing to do with the memory effect.
Li-ion batteries should never be depleted to below their minimum voltage, 2.4 V to 3.0 V per cell.
Li-ion batteries should be kept cool. Ideally they are stored in a refrigerator. Aging will take its toll much faster at high temperatures. The high temperatures found in cars cause lithium-ion batteries to degrade rapidly.
Li-ion batteries should not be frozen [50] (most lithium-ion battery electrolytes freeze at approximately −40 °C; however, this is much colder than the lowest temperature reached by household freezers).
Li-ion batteries should be bought only when needed, because the aging process begins as soon as the battery is manufactured.[27]
When using a notebook computer running from fixed line power over extended periods, consider removing the battery[51] and storing it in a cool place so that it is not affected by the heat produced by the computer.
Hope this helps someone.
Thank you DarkDvr, wikipedia credits to him
Also, feel free to read up at batteryuniversity(DOT)com/learn/article/how_to_prolong_lithium_based_batteries
*again, this is my first post so it wont let me link directly.
Good read. Al though, this is XDA after all and you will be flamed for using wikipedia as as a source. Just giving you heads up.
Lejjvi said:
Good read. Al though, this is XDA after all and you will be flamed for using wikipedia as as a source. Just giving you heads up.
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"battery conditioning" is only bad if you do it all the time and drain it completely dead often...
Lithium ion batteries don't really need this...
And should only be done if you think you have faulty battery stats due to flahing new software or roms....
We all know this and the people that don't now know.. thanks op for informing the uninformed!
sent from a 3devo
You need to condition it for the phones software as well... Otherwise it will shut off before the battery is actually dead. But yes, you shouldn't do it all the time.
People confuse why I needs to be done is all.
Yeah, should change the title. It's misleading.
Sent from my HTC Evo 3D.
there is a diffrence between a deep cycle and a normal cycle.they are only resistant to developing a memory.
Yes, I know this xda, but this after reading some of the multiple battery life threads it seemed like there was some misinformation floating around. I mean, I know batteries are the cheapest part of the phone and easy to replace, but still. No point in going through all the trouble of multiple deep cycles when it actually does harm to the battery.
Also, I wonder what the people with 2 batteries do, and how this affects the battery meter. Or, if you switch to a higher capacity battery. At what point does the unit recalibrate itself?

Myths about batterystats.bin

So i was browsing the Nexus S forum and Google+ and found an interesting post by one of Android/Google engineers : https://plus.google.com/u/0/105051985738280261832/posts/FV3LVtdVxPT
Today's myth debunking:
"The battery indicator in the status/notification bar is a reflection of the batterystats.bin file in the data/system/ directory."
No, it does not.
This file is used to maintain, across reboots, low-level data about the kinds of operations the device and your apps are doing between battery changes. That is, it is solely used to compute the blame for battery usage shown in the "Battery Use" UI in settings.
That is, it has deeply significant things like "app X held a wake lock for 2 minutes" and "the screen was on at 60% brightness for 10 minutes."
It has no impact on the current battery level shown to you.
It has no impact on your battery life.
Deleting it is not going to do anything to make your more device more fantastic and wonderful... well, unless you have some deep hatred for seeing anything shown in the battery usage UI. And anyway, it is reset every time you unplug from power with a relatively full charge (thus why the battery usage UI data resets at that point), so this would be a much easier way to make it go away.
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The whole idea of erasing that file having any effect on battery life is pure superstition and wishful thinking. The battery usage UI describes what your device has been doing that has been consuming battery; it doesn't change how the device is using the battery.
You want to "refresh" your battery stats? Charge your phone. When you unplug it again, the device knows it's at full charge (because the battery firmware says so), so the stats tracking treats that as a known milestone for reporting purposes.
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interesting!
I never wipe my batterystatus.bin till now!
I also think it doesn't doing anything but never knew that reson thanks for sharing
Does this mean that calliberating your battery has NO effect? I've seen so many devs themselves recommending it. (ofcourse I might be understanding this whole thing wrong)
myozeus said:
Does this mean that calliberating your battery has NO effect? I've seen so many devs themselves recommending it. (ofcourse I might be understanding this whole thing wrong)
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well, franciscofranco, our kernel 'god', didn't wipe batterystats.bin in his life before. however i always flash things on a full charge just in case
well when you calibrate the battery you only del this file.
this is a one second task
on a macbookpro the calibartion of the battery takes a long time.
so I would not really call this calibration at all.
Thanks for the info...
It'll save time for the people like me ;-)
i never used that option ever
i have very good battery life xd
cekuhnen said:
well when you calibrate the battery you only del this file.
this is a one second task
on a macbookpro the calibartion of the battery takes a long time.
so I would not really call this calibration at all.
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A Laptop battery has many cells, and, once a while, they get different charges among them, that's why you have to fully discharge your laptop battery once a month, to get them all to the same amount of charge.
Since our phones have one cell in their batterys, I don't know if it's really necessary to calibrate them.
myozeus said:
Does this mean that calliberating your battery has NO effect? I've seen so many devs themselves recommending it. (ofcourse I might be understanding this whole thing wrong)
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no. caliberating does have good effects. but caliberating does not mean deleting the file. it means charging full n emptying it full n charging full again...
harshdoshi25 said:
no. caliberating does have good effects. but caliberating does not mean deleting the file. it means charging full n emptying it full n charging full again...
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Actually, lithium ion batteries do not need calibration. Period.
The elements its comprised of have no "cell memory" and the battery firmware is hardcoded with the knowledge of what a full charge should be. Anytime you drain your battery past normal thresholds, it just puts extra wear and tear on the cells and reduces its ability to hold a full charge. By intentionally draining the battery in one sitting, all you're doing is stressing the battery and causing the problem you're trying to correct.
Long story short: Don't calibrate; it just hurts your battery.
Now, if you had a NiMH or an older LiPoly battery, I'd say go right ahead and try to calibrate them if they aren't holding a charge. These types of batteries do have "cell memory" and can often forget what a full charge is.
This information is widely available; it's no secret and I'm not making it up. You can search for yourself or read up on it at Battery University.
Tonhos said:
A Laptop battery has many cells, and, once a while, they get different charges among them, that's why you have to fully discharge your laptop battery once a month, to get them all to the same amount of charge.
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Actually, capacity drops in multi-cell batteries are typically due to voltage drops in certain cells. Draining the battery won't bring them back; you're only going to hurt the capacity of the rest of the cells. The only solution is to replace the defective cells.
Placebo placebo placebo, like I have always said. And like "theanykey" said, do not let lithium ion battery go completely empty, it just reduces battery lifespan. Seriously.
calibrating a Lithium ION battery does have some effect. 9x out of 10 there is some type of protection circuit on the battery that monitors its maximum charge, lowest charge, and wear levels and static values set by the manufacture.
Often times there can be a false wear level (wherein the wear gets set too high, usually caused by disconnecting the battery from a charge at like 95% or running the battery down to below 10%) and the charging circuitry within the battery WONT charge above that level.... to circumvent that improper wear level... a full charge, then FULL drain, then full charge is needed to properly reset those values and gain you extra battery life as the battery gets charged more.
nd4spdbh said:
calibrating a Lithium ION battery does have some effect. 9x out of 10 there is some type of protection circuit on the battery that monitors its maximum charge, lowest charge, and wear levels and static values set by the manufacture.
Often times there can be a false wear level (wherein the wear gets set too high, usually caused by disconnecting the battery from a charge at like 95% or running the battery down to below 10%) and the charging circuitry within the battery WONT charge above that level.... to circumvent that improper wear level... a full charge, then FULL drain, then full charge is needed to properly reset those values and gain you extra battery life as the battery gets charged more.
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Wear level has nothing to do with usable capacity and is not accounted for during charging. It's an arbitrary number that exists solely so people will replace their batteries sooner than necessary. If I recall, its not uncommon for wear level to be calculated by charge cycles. So, by "calibrating", you may actually worsen the wear level.
Also, you do realize that lithium ion batteries never fully discharge, right? Once they do, they're dead.
If you want a technique that actually increases short-term capacity(at the expense of ruining the battery's longevity), look up bump charging.

battery drain - found a way to fix it...

I accidentally found a way to over come the unsual battery drain. This method may not work out with completely worn out - old batteries. A month after I bought my s3, my battery started to drain excessively. I had installed no new apps..
Phone Usage was almost the same. Before the battery drain I got almost 26~30 hours of battery at normal use... after the battery drain I got less than 12 hours for the same usage.
So here is the method.
Put the phone on charge. After puttting it on charge, switch off the phone... u can restart it after twenty seconds... ideally wait till the phone cools down, if it feels hot... don't use the phone till it reaches 100% charge. This method works for any initial charge. I.e. it works when the battery is at 98% or at 1%. But if u try this method when u have 1% and u keep using the phone while charging, this method may not work... so ideally don't use the phone while charging.
So now I do this everyday and my phone lasts for 26~30 hours on normal use.
I used gsam battery monitor pro to monitor my phone's temperature and battery usage.
It also gives the average number of hours the battery will last.
For those who dont know : Ideally charge the battery when it is leas than 10%. This will increase the overall battery life.
P.s. it works for me. Don't complain if it doesn't work for u!!
Cheers,
Kraadhagaa aka sivakannan
http://batteryuniversity.com/learn/article/battery_calibration
You basically calibrated your battery. Typically only needs done about once a month at most to keep your battery gauge accurate. Any more than that hurts your battery.
t1n0m3n said:
You basically calibrated your battery. Typically only needs done about once a month at most to keep your battery gauge accurate. Any more than that hurts your battery.
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Calibration is draining the battery till 0%, phone switches off and charging it till 100% when the phone is switched off.
This did not do the job. Battery drain was still bad.
After trying out my method, i charged the phone for two or three cycles without this method. Then the battery drain got horrible till the method was repeated.
I have been testing this method for a month. It hasn't caused Any harm. My battery life is good.
Its in effect the well posted bump charge method .
jje
stop playing games!! :silly:
sivajikannan said:
Calibration is draining the battery till 0%,
No its not calibration is using the phone .
Basically many just talk a load on nonsense when it comes to battery's .
jje
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Click to collapse
I don't know a lot about batteries so I don't know how much of this is true.
I read that the phones chip, if it regularly see's the phone's battery going no lower than say, 15% over time (i.e, user always charges it once it hits 15%) that it will start to use this 15% mark as the "empty" level and that the best thing to do is to "remind it" every now and again, that there are battery levels below this 15% by letting it drain to 0%
Anyone got any comments on that?
Dianne Hackborn13 Jan 2012+
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Once you get above 90%, I would stop worrying about it. I think most if not all devices need to go through charge/discharge cycles while fully charged to keep the battery life good, so when it is "charged" it will actually be ramping up and down to do that. How this is shown to the user varies across manufacturers, and there is really no clearly right solution -- if you show them the actual changes in level they start complaining and getting concerned about their battery not being at 100%, so it is good to just show it at 100% at this point but then you are giving a little white lie about the actual level.
NOTE last line 100% is not really true .
As to the 15% all i read is that continual dropping below 15% / 10% is bad for the battery's overall life .
jje
JJEgan said:
As to the 15% all i read is that continual dropping below 15% / 10% is bad for the battery's overall life .
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Click to collapse
The other thing with Li-On batteries is that (as you say) using the last 10-15% of charge is damaging to overall battery life. If the battery reaches "True 0", it would be irreparable. That said, this last 10-15% of "Danger zone" (as I will now call it) is inhibited by an EPROM setting so a user cannot actually get below that.
Essentially, what I am saying is that the 10-15% "danger zone" is not included in the 0-100% that we perceive to be the "battery life" as the user.
So in the 1st attached image, the Red area represents the "danger Zone" or EEPROM protected charge. The Green area represents the 0-100% that we use as a user.
But in this case, I am asking if the EPROM sees the 15% remaining charge of the green area (forgetting the danger zone exists), if regularly not dropping below that, it becomes the new 0%, losing the last 15% of the green area as per the second image?
The phone only sees a reported voltage value, which it compares to a table giving an approximate % remaining - based on a fixed battery capacity.
The 15% danger/red zone you refer to is below the minimum voltage the phone will allow the battery to ever reach, as below this value the battery itself will act to disconnect - giving unexpected shut down and data loss/partition corruption. You would also be unable to recover a battery in this condition with a normal charger.
Best advise is still to recharge before the battery reaches 10 to 15% of the phone's indicated remaining value - you can safely go down to 0% indicated but will lose a little battery capacity each time you do this, as the electrodes inside the cell are being worn away. It's no big deal, hence why the phone permits it to happen, you'll just need to replace the battery earlier.
Similarly charging to 100% and holding the cell there is just as bad, remove from the charger and start using it right away.
boomboomer said:
The phone only sees a reported voltage value, which it compares to a table giving an approximate % remaining - based on a fixed battery capacity.
The 15% danger/red zone you refer to is below the minimum voltage the phone will allow the battery to ever reach, as below this value the battery itself will act to disconnect - giving unexpected shut down and data loss/partition corruption. You would also be unable to recover a battery in this condition with a normal charger
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Click to collapse
This I know but it's not related to my question.
boomboomer said:
Best advise is still to recharge before the battery reaches 10 to 15% of the phone's indicated remaining value - you can safely go down to 0% indicated but will lose a little battery capacity each time you do this, as the electrodes inside the cell are being worn away. It's no big deal, hence why the phone permits it to happen, you'll just need to replace the battery earlier.
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Click to collapse
I'm not sure I agree with this but again, it's not related to my question.
*shrug* Sorry, I read your post about 10 times last night and figured you were talking about calibration. I then posted accordingly. Tonight, after I read your reply, I tried reading your post again a few more times. Finally, I came to the conclusion that your post makes no sense, so I give up trying to decipher what your post was trying to say. I surrender.
The best answer to the battery drain issue is a application called "GREENIFY". It closes all the background applications.. Try it n thank me if u feel it worked.. It increased my battery life more than twice..
Sent from my GT-I9300 using Xparent Cyan Tapatalk 2
Lol... e=mc^2 doesn't make sense to a lot of people either
t1n0m3n said:
*shrug* Sorry, I read your post about 10 times last night and figured you were talking about calibration. I then posted accordingly. Tonight, after I read your reply, I tried reading your post again a few more times. Finally, I came to the conclusion that your post makes no sense, so I give up trying to decipher what your post was trying to say. I surrender.
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The 1 percent solution ?

OK, first of all, we all know that the S6 has NEVER been known for being a battery life champion. BUT, here's the problem .....
Battery reports relatively consistent decline in charge over time, until it gets down to 1%. At that point, the device still has sufficient charge to run for about one hour with the display on and set at full brightness.
Same on Stock Nougat, L.O.S 14 and L.O.S. 16. Same after full factory re-sets on all three. Same on pull and re-connect battery, which is a factory-new Samsung replacement for the original (not the 7 edge mod)
OBVIOUSLY, there is something not quite right about battery capacity reporting here.
Suggestions?
nezlek said:
OBVIOUSLY, there is something not quite right about battery capacity reporting here.
Suggestions?
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Ion Lithium batteries do not like to be completely discharged, to my knowledge ideally they should always be operated between 20% and 80% of their capacity.
Some laptop's do shut-down them selves when battery reaches 5% to safe guard the battery health.
So, yes, 1% reported by the battery does not actually include the "reserve" charge to prevent damages and, unless you really have to, do not use you phone with battery below 10% and charge it !
Under normal circumstances
enryfox said:
Ion Lithium batteries do not like to be completely discharged, to my knowledge ideally they should always be operated between 20% and 80% of their capacity.
Some laptop's do shut-down them selves when battery reaches 5% to safe guard the battery health.
So, yes, 1% reported by the battery does not actually include the "reserve" charge to prevent damages and, unless you really have to, do not use you phone with battery below 10% and charge it !
Click to expand...
Click to collapse
Under normal circumstances, yes, definitely, keeping it between 30% and 80% is ideal, but when the goal is to accurately calibrate the battery / charging monitor circuitry, more accurate results are to be obtained by running the device to the point of battery exhaustion, at which point the reserve capacity designed into all lithium batteries still remains. But this is NOT something to think about doing on a daily basis. An S6 or S6 edge first run to the point of shutdown will actually re-boot but shut down just about immediately thereafter - iterations are not advised. You want it to have just enough left to get it to re-boot and stay running while charging, at which point you can monitor the recharge . Check out the data from Battery University or the support pages for Accu Battery for more details. Trying to use up the built-in safety margin is a fool's errand, and if you've ever seen a mishandled lithium cell turn a vivid red while the device in question melts around it, it should give you a healthy respect (if for some reason you did not have it in the first place) for not messing with or even attempting to mess with the reserve. The problem here is that the "1%" remaining on the charge meter (which is above, beyond, and independent of the untouchable reserve) actually appears to represent about 15% of the rated capacity of the battery, or in this case, over an hour of screen-on run time, and by never running that out, a current-flow-based app like Accu Battery will invariably under-report capacity going forward as a result. Such apps measure how much current is drawn to get from 'x' percent to 'y' percent being reported, but when the amount of current draw to get from 1% to zero is a range of around 300 mAh, for a battery nominally rated at 2,550 (for an S6) or 2,600 (for a S6 edge) as the total capacity, the problem of how accurate the "1%" figure is should be kind of self-evident. I am not willing to see how low a "0%" capacity report can be pushed down. Sanity has to rear its ugly little head at some point, after all.
Many alternative kernels, etc.. claim to address this problem, but I have yet to find one that actually does the job. It is rumored that Samsung service facilities can do a complete reset of the capacity reporting capability, but who knows? Maybe the luck of the draw gave me a dud battery from Samsung as the replacement. :crying:

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