Well I found the week before last that my battery was going flat rather fast...stock Nougat and CPU underclocked.
Then I saw this (see pic)...when I opened the phone I saw that the battery was swelling, I have only used the supplied charger btw.
It got to the point I could charge in 30mins but discharge in 1hr and a lot of heat
...new battery all is fine. Just a warning!
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Hi, phone seems to be charging much faster than im used to. i mean like from 4% to 70% in under 2 hours.
Wondering if this is an issue with my setup (in sig) or some other factor...or if its not really an issue.
Cant comment on the battery life after a charge like this as i have not used it yet. I have however had poor battery life the last 2 days, but i think that was because of the pri/nv 1.90 issue, and have since downgraded to 1.7x.
tomorrow i hope to see the expected battery life, but the charge time is concerning me.
Anyway like an app to test the battery readout for accuracy? currently using mini info along with the notification area battery indicator.
Thanks
Was this with the stock charger? or? I know when I use the usb charger that came with my Nook with my EVO it charges in about 1/3 the time. I've never really compared how "solid" the charge was but I've always done this when traveling and don't remember my EVO draining abnormally fast.
Until you can conclude that your battery life has suffered then this sounds like a blessing. What I would suggest doing is letting the battery drain out completely before your next charge. Batteries need that sometimes.
I always use the stock Evo usb cable with either my powered USB hub or the stock wall charger. Its been my experience that the USB charging is a little slower then wall charging, but last night it charged extremely fast. I went from 4% to 100% in a little under 2 hours.
Could have just been paranoid because my battery life yesterday was abnormally low, a result of having pri/nv 1.90 i think (i downgraded to 1.7x last night).
I "calibrated" the battery last night by charging to 100%, unplug, replug, shutdown, unplug/replug etc. Did this a dozen or so times then cleared my battery stats.
Battery life will hopefully be normal today. Ill report back my findings.
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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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
So I've been running some random tests with my battery and usage to try and figure out how this thing maintains charge and such. I'm running rooted stock TW 4.1.1 with Juice Defender.
1. Usually, I charge the phone overnight while I sleep, then when I unplug it, it drops down to 99% immediately. Lately, it's been dropping down to around 96% in 45 minutes of no use then leveling off. This is with a new battery that replaced another one right after the Jellybean upgrade as I thought my battery was busted.
2. I usually get about 12-14 hours with 2.5-3hrs of screen time (I get crappy service where I work and the phone is in airplane mode when not in use, and when in use, it has bad service).
3. This weekend, I didn't charge it over Friday night and let it die Saturday morning. Then I charged it for about 3 hours or so and ended up getting about 34ish hours with 3.5 hours of screen time out of it (using wifi and better network since I'm at home).
4. I charged it overnight last night (about 9 hours) and when I unplugged it, it dropped to 98 immediately, then 30 minutes later it was down to 96 again.
With all that said, I'm thinking that I probably should not be charging my phone overnight at all anymore. The only problem with that is that I don't have enough time in the morning to charge it before work and I can't charge it while at work as I move around all day.
Will I wear my battery down more by not fully charging it and using it throughout the day and only charging it when I can? I've read that battery website that people post constantly where they talk about how the new batteries stop charging after a certain period of time, but if that were the case, why would I get better battery service from only charging for 3 hours then leaving it overnight?
I know there are a million battery threads on here and we probably didn't need another one, but i thought I'd try to create one with a bit more substance than "oh i get 6 hours with 5 hours screen time on such and such a ROM". I'm more interested in the physical methods than the software methods for getting the best out of the battery.
The quick drop off in battery charge is probably partly due to some hysteresis that has already built up. There is a lag time between the voltage demand on the battery and the battery's ability to deliver the required current. Energy is lost during this lag time.
I posted this another forum so I am recycling but it is relevant.
Some general guidelines when charging Li-ion batteries:
A slow charge is preferable because it reduces heat and hysteresis. Heat of any sort decreases the overall life of the battery. Hysteresis reduces the performance of the battery in the discharge state causing a quicker plummet in battery charge from 100%. (NiMH batteries are worse with hysteresis, but Li-ion cells suffer from hysteresis also).
Unplug the charger as soon as possible when the battery is fully charged.
Lithium ion cells however can not tolerate overcharging or overvoltage and the charge should be terminated immediately when the upper voltage limit is reached.
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Do not use charging pads or mats as they introduce more heat.
Pulse chargers do the best job because they give the battery brief rest periods to allow the chemicals to settle and accept the charge with reduced hysteresis and heat.
A memorable though not quite equivalent phenomenon is the pouring of beer into a glass. Pouring very quickly results in a lot of froth and a small amount of beer at the bottom of the glass. Pouring slowly down the side of the glass or alternatively letting the beer settle till the froth disperses and then topping up allows the glass to be filled completely.
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Depth of discharge. Consistently letting the battery run down to very low reduces the overall lifetime. It is better to minimize the depth of discharge by topping off when convenient than running it down completely.
Similar to a mechanical device that wears out faster with heavy use, so also does the depth of discharge (DoD) determine the cycle count. The shorter the discharge (low DoD), the longer the battery will last. If at all possible, avoid full discharges and charge the battery more often between uses. Partial discharge on Li-ion is fine; there is no memory and the battery does not need periodic full discharge cycles to prolong life, other than to calibrate the fuel gauge on a smart battery once in a while.
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Can't yet post direct links
Battery University . Com
mpoweruk . com / chargers . htm
gotcha. so i shouldn't be charging it overnight anymore. thanks for all that other info, too. very useful to know.
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.
So I've noticed some weird battery behavior on my Pixel 2 XL and was wondering if anyone else has noticed this.
I normally like to ;et the battery drain down into 5% or so before plugging it in and letting it charge through to 100%. I started noticing that a full charge would take me nearly 2 hours fully charge. A couple of times last week, I had to step out and the phone was charged approximately 95%. I unplugged the charger and walked to my car (about 5-6 minutes to get to the car) and when I looked at my phone, charge had dropped to 88%. Over the next few days I noticed this kind of excessive drain immediately after unplugging the charger. Aside from this, I still achieve 24+ hrs of battery life on a single charge so I am not sure that it is a HUGE issue, but one I felt shouldn't be happening nonetheless. Last night the same happened - unplugged around 95% and i literally saw the battery indicator go to 93%, 91%, 88% and then stop at 87% in about a minute. I immediately called Google support, shared my screen, and after speaking with the person on the phone - i was told I should definitely RMA, which i did..so I have a replacement coming.
I don't use always on display or always listening and I am extremely good at clearing open apps before I put the screen to sleep. I have noticed this at home, on my wifi as i always need a charge later in the day when I'm home from work. Also, I use the OEM charging wire and brick.
Anyone else notice this ?
I have not noticed battery drain fast after unplugging at full charge level. I would say you probably should RMA the device. Also it is not good to let lithium-ion batteries go down to low levels a lot like that, it will degrade the battery faster. The less you let the battery go down to low levels, the more charge cycles you will have, which means long battery life over time.
raidflex said:
I have not noticed battery drain fast after unplugging at full charge level. I would say you probably should RMA the device. Also it is not good to let lithium-ion batteries go down to low levels a lot like that, it will degrade the battery faster. The less you let the battery go down to low levels, the more charge cycles you will have, which means long battery life over time.
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I definitely did RMA, it was a painless process.
And I always thought that maximizing the charge of the phone (letting it get low, then charging up) would actually keep the battery healthier as it would reduce the # of times I charged it. Am i way off base with my logic for that?!
Going into my third week with my 2 XL and I haven't seen anything abnormal regarding battery drain.
I do practice the method of unplugging at 85% and plugging back in around 15% (per Accubattery's reco, and other reading done online)....
There's no proof that it helps as suggested, and while I realize that only allows me access to 70% of the battery's charge potential, I'm rarely, if ever, away from a plug for more than half a day.
This theory worked well in my 6P until it got the intermittent BLOD... My battery health was around 84% (via Accubattery) after 17 months of pretty heavy use.
Again, not sure it is solid fact or not, but you could always try it for a month and see if there is any noticeable difference in battery drain.
Thank you for that insight! I will absolutely do some research. You're battery health after 17 months is really impressive. I just switched from a Nexus 6p that was definitely showing signs of wear after 2 years of fairly standard use. I hadn't used accubattery, but I will download it on my new replacement and monitor results.
I will say though, that aside from that slight blip i noticed - the battery (andOS optimization i'm assuming) is amazing. I get through a day plus easily. So, anything I can do to keep that consistent or squeeze more time out of it is a no brainer.
Az Biker said:
Going into my third week with my 2 XL and I haven't seen anything abnormal regarding battery drain.
I do practice the method of unplugging at 85% and plugging back in around 15% (per Accubattery's reco, and other reading done online)....
There's no proof that it helps as suggested, and while I realize that only allows me access to 70% of the battery's charge potential, I'm rarely, if ever, away from a plug for more than half a day.
This theory worked well in my 6P until it got the intermittent BLOD... My battery health was around 84% (via Accubattery) after 17 months of pretty heavy use.
Again, not sure it is solid fact or not, but you could always try it for a month and see if there is any noticeable difference in battery drain.
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AceKingNYC said:
I definitely did RMA, it was a painless process.
And I always thought that maximizing the charge of the phone (letting it get low, then charging up) would actually keep the battery healthier as it would reduce the # of times I charged it. Am i way off base with my logic for that?!
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Lithium-ion batteries work on charge cycles and are happier between 50-85% charge levels. You cannot really "overcharge" the battery because the phone will stop charging at 100% and just trickle charge to keep the battery at this level. But unplugging it after full charge defiantly wont hurt. If you keep the battery at higher levels I would't be surprised that you would get 1500+ charge cycl.es out of the phone before any real degradation which should easily get you years of good battery life. I find the battery life on the XL to be awesome and it lasts me throughout the day with still 40% battery life left and that is with pretty heavy usage.