I've been experiencing this issue for awhile now on multiple Roms after multiple charge cycle.
Battery drain is consistent and expected until around 30%. Then the battery drains to 0 in 90 minutes or less.
Anyone with similar issue or thoughts?
Do I need to replace my battery? I've been seeing this for probably 4-6 weeks.
Yeah, I have the same problem. I think it means that your battery is not calibrated properly.
It's either not calibrated properly (meaning charge it 100% and go into the boot menu->advanced->erase battery stats) to recablirate and or you have gone past the 100 charge cycles a battery phones stays optimal. Depending on use you may need it
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I have tried a lot of different rom and kernel combos to try to fix my ridiculously bad battery life. I have also tried disabling lte, wifi when not in use, bt, nfc, location services, and a bunch of apps. But my battery life always sucks, even during sleep.
anyway, this causes me to end up charging my phone like 2-4 times a day. I dont want to charge over night because it takes up multiple recharge cycles and batteries come with a limited number of cycles.
So, i am wondering if anyone knows the number of recharge cycles the stock 1850 mah battery on the cdma Gnex has. I have tried googling it to no avail.
Also, i know that charging overnight is not as bad as it was with older batteries, but it still takes up multiple recharge cycles. Im just wondering, is charging overnight not as bad as i think? and for those of you who have been charging our gnex's battery overnight for a while, have you noticed it hurt your battery life at all or is it as good as it was before?
thanks in advance
a normal li-on battery has 500 complete charging cycle.
i kept it charged overnight,it's as good as before.
Be advised a charge cycle equals 0% to 100%, and not how often. Therefore, imagine it as a bottle. If its half full and you top it off, that's half a cycle. If it's 3/4 full and you top it off, that's 1/4 of a cycle.
Sent from my Galaxy Nexus using XDA App
I have a 3900 mAh battery from Mugen. Ive noticed the battery lasts about 30 hours. But I find something very strange. It drains around 96% in just 15 minutes on straight boot after charging every time. In fact, the first 80% of so drains pretty quickly? Ive had it in my phone for about 2 weeks. Has anyone else noticed this or know why this may be happening. Also when at 100%, and i inplug it, goes straight to 98!
Have you done a battery calibration? Get the Battery Calibration app from the play store.
There's some argument as to whether this does anything or not, but have you conditioned the battery? That means letting it drain completely, then charging it continuously till it hits 100% - do that several times.
Its been proven that the app does nothing, which wipes battstats.ini or something
As for conditioning, its been down to around 3% before being charged. Ivehad the battery 2 weeks now.
Lithium Ion batteries have a very steep drain for about the first 15-20% and also slower charging from those levels. Once past that the drain is nearly linear, and then gets very steep at about 3.6v.
You can see it in the graphs here:
http://www.ibt-power.com/Battery_packs/Li_Ion/Lithium_ion_tech.html
Typically the way our devices are designed, they do not charge the battery to 100% full it can actually cause damage to lithium ion based batteries. what happens is the battery is charged to 95%-98% then the device stops the charge and allows the battery to drop to abut 85%-90% and then starts trickling it again. By design the batteris typically drain a little bit fast at the top level.
further more lithium ion batteries survive more recharge cycles if the D0D (depth of discharge) is about 25% remaining.
Basically you battery will last longer by the device not charging to 100% and letting it discharge slightly when in trickle mode, and if you don't let it die completely and charge it when it reaches around 15%-20% left.
-Mr. X- said:
Typically the way our devices are designed, they do not charge the battery to 100% full it can actually cause damage to lithium ion based batteries. what happens is the battery is charged to 95%-98% then the device stops the charge and allows the battery to drop to abut 85%-90% and then starts trickling it again. By design the batteris typically drain a little bit fast at the top level.
further more lithium ion batteries survive more recharge cycles if the D0D (depth of discharge) is about 25% remaining.
Basically you battery will last longer by the device not charging to 100% and letting it discharge slightly when in trickle mode, and if you don't let it die completely and charge it when it reaches around 15%-20% left.
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Hmm that kind of makes sense. Everyones been telling me to not let it drop to below 35% though cause it 'wears the battery out'. Ive been charging at around 40 cause thats where itd be after a full day at work and such.
Ive been getting concerned though because ive seen screenshots of people getting 31 hours with 7 hours of screen on time.
Im at 62%, 9.5 hours total, 1 hour 7 min screen on. Thats mostly with Wifi on though.
My stock battery used to drop 10% an hour on 4g, and this one dropped ~11% on 4g just now....
mknewman said:
Lithium Ion batteries have a very steep drain for about the first 15-20% and also slower charging from those levels. Once past that the drain is nearly linear, and then gets very steep at about 3.6v.
You can see it in the graphs here:
http://www.ibt-power.com/Battery_packs/Li_Ion/Lithium_ion_tech.html
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Click to collapse
Thanks for the graph!
Sent from my amazing G2x running EaglesBlood and Faux.
Now at 36% And its just sitting off mostly with some light texting
Now 35!
Got a weird feeling the battery is messed up.
Its 3900mah, divide by 650 = 6 hour charge
Its been 6 hours and its at 46% with the phone off so its not using power, and on the wall charger.
Rekzer said:
Its been proven that the app does nothing
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I haven't heard that before. Got a source for that info?
mayonaise said:
I haven't heard that before. Got a source for that info?
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http://www.androidcentral.com/wiping-battery-stats-doesnt-improve-battery-life-says-google-engineer
I've never seen anything like this. My battery literally dropped 6 percent in a split second while I was looking at the %. Is this a manufacturer defect, would a factory reset do anything to help? Please Help.
WackyClash said:
I've never seen anything like this. My battery literally dropped 6 percent in a split second while I was looking at the %. Is this a manufacturer defect, would a factory reset do anything to help? Please Help.
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No, not necessarily. It takes time for a system to properly calibrate the battery. You should always give it a few full charge cycles before assuming you have a problem.
phonic said:
No, not necessarily. It takes time for a system to properly calibrate the battery. You should always give it a few full charge cycles before assuming you have a problem.
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This.
I wouldn't worry about it it likely hasn't calibrated yet, I've seen many of my devices do this, especially new or freshly wiped
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You are overreacting. Large amount of power consumption in short time isn't unheard of. For example, it has been reported that phone searching for connections and syncing everything at once can cause large drops in battery meter. And battery meter isn't always accurate anyway.
If the battery drops more drastically and happens more than a couple of times, then I would worry.
My tablet does the same too it either goes from 78 to 76 or just skips from 30 to 26 randomly
The first day I got it, the battery went from ~50 to ~60. You read that right...it went up without charging. Just let the battery settle and it will become perfectly normal again.
Mine does the same, drop from 33% to 23% instantly. and while charging, it jumps from 94% to 100% too. But i do get 9:30 hrs use time with Chrome.
Still in the return period window, not sure to return it or not.
I think that the battery percentage sometimes freezes and doesnt update right. So once the software finally gets a good reading or update it will suddenly change alot. I had it stay at 85% for like 3 hours and was thinging, AWESOME this is amazing, then 15 minutes later it was at 50% and i was like, oh, damn it was just playing mind games with me.
The battery gauge doesn't really 'know' the charge state of the battery, it's just guessing more or less accurately based on a model of the battery.
It takes things like battery voltage, load, temperature, voltage change with varying load (to estimate internal resistance of the battery) to basically make an 'educated' guess of the charge state. There can be pretty big corrections of that guess - a 10% jump is very normal. It doesn't mean the battery charge state has changed, it just means the battery gauge has corrected it's estimate.
during charging, i seen that it increased 1% per every 4~6 mins from 1% to 94%, then it jumped to 100% from 94% in the next 6 mins.
It also skipped percentage 4~6 times while charging from 1% to 94%, 1% per skip.
I used Batterybot pro to monitor the battery, it will logs when the percentage has changed, that's how i know it was doing this.
its not that old, maybe 6 months old, about the last 3 times that my battery has nearly fully discharged, its not got all the way to 0% and has been going off at 3% but then when i plug the charger in and turn the tablet back on the battery shows as 0%
i also noticed the other day it was at about 4% battery and i wa son a pool game, the screen started flickering on and off, and then it turned off, not sure if that's just because it was on the very end of the battery, but was still around 4% anyway so should have been ok till 0%?
any ideas if i have something wrong or is it normal?
James
The tablet will shut off once the battery is depleted. Anywhere under 10% is normal. Letting your device run that low is hard on the battery and will reduce its lifespan.
Read this: http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
The battery meter is not even remotely as accurate as you expect it to be. Its just an estimate of battery voltage versus how you are using the device. Don't expect it to be accurate to within a few percent, or even 5-10%.
Heck, I've had some devices show a drop of 20-30% and shutoff. Probably just some metering error, and it didn't happen often. But that tells you how inaccurate the meter can be.
As another mentioned, deep cycles are not good for the long term life of Li ion batteries. Charge fully and frequently.
Lately I've been having problems with the battery life. The charging asymptotes at about 50% and then after a while it resumes charging, but overall it takes about 10 hours to charge, which is a little excessive since I'm using the stock battery. Meanwhile, after I take the phone off the charger, it either instantaneously drops to approximately 60% battery life or drains at an incredible rate, going from 100 to 60% in 2-3 minutes. As a result, I'm getting maybe 12hours of battery life with limited usage; 1 hour or so of screen time reading, no cpu intensive apps running, which is rather annoying.
This started approximately 1 month ago, but I didn't post on this until I was pretty sure I ran through most everything already discussed and for the previous 11 months, everything was working well. Also, I'm pretty sure it wasn't an update issue since I went through so many roms and the issue remained.
First off I replaced the battery and the problem remained. Second I obtained an external charger to charged the batteries in case it was the port. Then I tried battery calibrations from various sources, using apps, physical drain/charge cycles, manually deleting the battery stats files (just in case). As well, I have tried going to CM11, back to stock T-Mobile, back to CM11, to SlimKat and now I am back on CM11 (calibrating all the way, again, just in case) in hopes that it was a problem with an update, but the problem persists through all of this.
Looking at/using battery monitor widget, it appears that the battery voltage is being underreported; I charge the batteries either in the phone or in the external charger and they reach approximately 4.3 volts, however when I place them in the phone and boot up, the S3 reports the voltage as about 3900 mV. I even checked the battery under load, and while the phone is reading 3900 mV, the voltmeter is reading 4.2 volts. The phone tracks the voltage but it continually underestimates the voltage by approximately 0.2-0.3 volts, e.g. when the phone is reporting 3500 mV, when I measure it, it is 3800 mV. I couldn't find information on the S3 specifically, but a lot of other electronics estimate battery life based on voltage, which is why I spent so much time discussing this.
So the question is, what am I missing that is causing all of these problems? I am at a loss.