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For about the last 3 weeks my phone will not charge to 100%. It'll get to about 80% and that's it. Last night I got my new battery and a stand alone wall charger. I charged the new battery in the stand alone charger and put it in the phone and it reads 87%. I put the battery back in the stand alone charger and it says fully charged so I check the battery with my meters and it reads 4.195 volts and from what I've read 4200 mv is fully charged, 4.195 v is reeeeeeeeally close to a full charge. Can anybody tell me how to fix this? Is it a hardware problem? Does the phone not read voltages right? I just installed shiftao5p rom last night and still the same problem. I've read of a few others having this problem but have yet to find a fix for it. Don't tell me to calibrate the battery because I CAN NOT get to 100% so I can be able to calibrate.
If you have clockworkmod recovery you can calibrate from there. Make sure your battery is completely charged in your stand alone then go into recovery and choose erase battery stats, its in the advanced menu I believe. That might work for you. Good luck.
Sent from my PG86100 using xda premium
Robert542 said:
If you have clockworkmod recovery you can calibrate from there. Make sure your battery is completely charged in your stand alone then go into recovery and choose erase battery stats, its in the advanced menu I believe. That might work for you. Good luck.
Sent from my PG86100 using xda premium
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Click to collapse
I was gonna try that when I got home tonight. After I clear battery stats in clockwork should I leave it unplugged and let it drain to zero then try to charge back to 100%?
nxslt1 said:
For about the last 3 weeks my phone will not charge to 100%. It'll get to about 80% and that's it. Last night I got my new battery and a stand alone wall charger. I charged the new battery in the stand alone charger and put it in the phone and it reads 87%. I put the battery back in the stand alone charger and it says fully charged so I check the battery with my meters and it reads 4.195 volts and from what I've read 4200 mv is fully charged, 4.195 v is reeeeeeeeally close to a full charge. Can anybody tell me how to fix this? Is it a hardware problem? Does the phone not read voltages right? I just installed shiftao5p rom last night and still the same problem. I've read of a few others having this problem but have yet to find a fix for it. Don't tell me to calibrate the battery because I CAN NOT get to 100% so I can be able to calibrate.
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Click to collapse
The charge percentage is reported as based upon battery stats. Let me explain how your battery stats may lead to some weird readings...
Lets say you've got a battery that charges to 4.2V. As it discharges, it drops off uncharacteristically slow. Then, you use a battery where the voltage drop is more linear. The stats have determined that over the life of the old battery the voltage remains fairly flat for the first 15% to 20% or so, but the new battery drops off a bit quicker so it's going to look at that voltage drop as a sudden drop in charge capacity.
This situation can be aggravated my many factors. If your battery is reading a full charge, which it sounds like it is based upon your meter readings, then the next question to ask is whether the battery is achieving the life it should based on it's mAh rating. I'd be curious to see what the battery voltage is once it's flat dead. If it's not reading somewhere around 3.6 to 3.7 volts, then the phone probably is defective and not reading voltage properly. If it is reading that kind of voltage, then it's just an annoyance and hopefully battery stat wiping will remedy it.
i can leave my phone on the charger for hours and it will only get to 99%, then it takes another hour or so to read "fully charged"
adrenalinemotion said:
i can leave my phone on the charger for hours and it will only get to 99%, then it takes another hour or so to read "fully charged"
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Click to collapse
What kind of battery and kernel are you using?
nxslt1 said:
I was gonna try that when I got home tonight. After I clear battery stats in clockwork should I leave it unplugged and let it drain to zero then try to charge back to 100%?
Click to expand...
Click to collapse
Yes let it drain all the way till you phone shuts it self off then charge it back up to 100% again in the phone. Hopefully your phone will build the correct stats. If your phone isn't defective it should work for you. Hope all goes well.
Sent from my PG86100 using xda premium
Something else odd......the battery I'm using right now is a cheap Chinese eBay battery, 3500 mAh. It ran down to about 10% in about 3 hours so I pulled it and put in a fresh one. So I decided to put it back in and run it all the way down and then check the voltage on it. That was an hour ago when I put it in. It quickly dropped from 8% to 2% in about 10 minutes but since then I've been using the phone solid without a break trying to shut the phone off and it has not moved off 2% in about 45 minutes. Very odd.
---------- Post added at 10:04 PM ---------- Previous post was at 09:59 PM ----------
One more thing, I do not recommended these cheap azz eBay batteries or there extended battery covers. As you know the 4g and GPS antenna is in the battey cover and these cheaper one do not work. I got the batteries and cover last night and as soon as I put one in and turned the phone on it immediately went to 1x. I finally figured out it was the antenna, or lack thereof, so I modified it to get it to work. Pure junk. I normally go with seidio stuff and will buy nothing but that from now on.
---------- Post added at 10:15 PM ---------- Previous post was at 10:04 PM ----------
It finally shut off after sitting on 2% for an hour of solid use on the web, Facebook and youtube. The voltage is 3.682.
nxslt1 said:
Something else odd......the battery I'm using right now is a cheap Chinese eBay battery, 3500 mAh. It ran down to about 10% in about 3 hours so I pulled it and put in a fresh one. So I decided to put it back in and run it all the way down and then check the voltage on it. That was an hour ago when I put it in. It quickly dropped from 8% to 2% in about 10 minutes but since then I've been using the phone solid without a break trying to shut the phone off and it has not moved off 2% in about 45 minutes. Very odd.
---------- Post added at 10:04 PM ---------- Previous post was at 09:59 PM ----------
One more thing, I do not recommended these cheap azz eBay batteries or there extended battery covers. As you know the 4g and GPS antenna is in the battey cover and these cheaper one do not work. I got the batteries and cover last night and as soon as I put one in and turned the phone on it immediately went to 1x. I finally figured out it was the antenna, or lack thereof, so I modified it to get it to work. Pure junk. I normally go with seidio stuff and will buy nothing but that from now on.
---------- Post added at 10:15 PM ---------- Previous post was at 10:04 PM ----------
It finally shut off after sitting on 2% for an hour of solid use on the web, Facebook and youtube. The voltage is 3.682.
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Click to collapse
Don't know if you looked, but the batteries HTC uses are cheap Chinese junk, which is why I tell people to not replace HTC batteries with HTC batteries. Better can be had.
As for the LTE antenna, the Tbolt doesn't have just one. The LTE spec requires dual antennas. The second antenna is located in the bottom of the phone underneath the ligher colored portion. LTE reception should roll over to that antenna if the other one is some how encumbered.
That voltage looks about right. And it appears the phone detected it correctly and took the correct action. Hopefully a wipe of stats fixes things.
All I know is before I modified the antenna 4g would drop in and out constantly then it would drop to 3g and it was in and out til it finally settled on 1x. After I modified it it stayed on 4g all night with a decent dl speed.
I hope this fixes it but I've wiped stats 20 times this week in clockwork and a battery cal app with no change but I didn't get the stand alone charger til last night so fingers crossed.
I'm sorry... flat dead voltage should be around 3.1 to 3.2. If you're phone is shutting off at 3.6v, it probably isn't reading voltage correctly.
loonatik78 said:
I'm sorry... flat dead voltage should be around 3.1 to 3.2. If you're phone is shutting off at 3.6v, it probably isn't reading voltage correctly.
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Any suggestions? What I don't understand is why it would charge fine for the first month that I had it.
Wish I had something wise to say, but I don't.
I charged it in the phone with it off all night, about 7 hours, and it shows 4.17 volts on the meter but it only showed 88% charge when I turned the phone on. Are you sure about the dead flat voltage? Is this just for the thunderbolt or droids in general? The reason I ask is because I ran down my incredible until it shut off and the voltage on it was 3.7, pretty close to the thunderbolt battery ran down. I think I'm getting the full use of my battery on the tbolt, the phone just wont show the correct voltage for some reason. Somebody needs to make an app that allows you to offset between what the battery voltage actually is and what the phone displays.
nxslt1 said:
I charged it in the phone with it off all night, about 7 hours, and it shows 4.17 volts on the meter but it only showed 88% charge when I turned the phone on. Are you sure about the dead flat voltage? Is this just for the thunderbolt or droids in general? The reason I ask is because I ran down my incredible until it shut off and the voltage on it was 3.7, pretty close to the thunderbolt battery ran down. I think I'm getting the full use of my battery on the tbolt, the phone just wont show the correct voltage for some reason. Somebody needs to make an app that allows you to offset between what the battery voltage actually is and what the phone displays.
Click to expand...
Click to collapse
3.163 volts is what my Tbolt calls flat dead. I've never meter tested the battery, but that sounds right to me. 3.7 is the nominal voltage; a mean between the min and max. If someone else could confirm what I'm saying, that would be helpful. If you like I can post some screen shots of the app I'm getting that data from.
loonatik78 said:
3.163 volts is what my Tbolt calls flat dead. I've never meter tested the battery, but that sounds right to me. 3.7 is the nominal voltage; a mean between the min and max. If someone else could confirm what I'm saying, that would be helpful. If you like I can post some screen shots of the app I'm getting that data from.
Click to expand...
Click to collapse
I would rather have a meter reading on it. Last night I kept checking voltage with my app and just before it went dead it was showing about 3.3 to 3.4 volts but the meter said 3.6. I'm sure it might read a lil lower with the app since it has a load on it but I don't trust the apps. A good meter wont lie.
nxslt1 said:
I would rather have a meter reading on it. Last night I kept checking voltage with my app and just before it went dead it was showing about 3.3 to 3.4 volts but the meter said 3.6. I'm sure it might read a lil lower with the app since it has a load on it but I don't trust the apps. A good meter wont lie.
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Click to collapse
Let me see what I can do. I'll check the voltage via meter and if it matches what my app is saying, I'll assume the app is reading honest.
loonatik78 said:
Let me see what I can do. I'll check the voltage via meter and if it matches what my app is saying, I'll assume the app is reading honest.
Click to expand...
Click to collapse
That would be great. The stock battery is doing the same thing the other did last night. Its been sitting on 2% for about 2 hours and an hour of that was of heavy use. I dl a battery monitor and it graphs over time and the voltage has not moved off of 3.511 in at least 2 hours. This is messed up.
I hope someone can figure this out, My (used) TBolt has been like this since I got it, now my wifes just started not charging to 100% 2 days ago, looks like she has the same issue...
Ive tried the wiping bat stats, loading roms, different batteries, chargers, etc...
Nothing has fixed it yet... just having to live with it...
hoping by some miracle the 2.3 OTA may fix it.... (but not holding my breadth)
When I charge my phone it only charges to 99%. I'll leave it in for a while, come back and it's only at 99%. Either charging in the wall, or on the computer. It used to make it to 100% then all of a sudden it just stays at 99% regardless how long it charges. So the charging light always stays on and never lets me know when it's fully charged.
Any idea why?
Thanks.
Mine does that too once in a while, randomly.
But the Sensation would do that to randomly.
Dunno why.
Battery is strange...
I get that too. But eventually it will get to 100%. There has been times where it was charged to 100% then suddenly drop to 99% even though it still plugged in.
Did you get your phone recently? I'm thinking its because the battery needs to be conditioned.
Mines always does that, as soon as I unplug it it jumps to 98%. Im hoping ARHD fixes this
I've installed Battery Widget (from Market) and it reports 100%. I plug in every night and in the morning it reads 100%.
zellroot said:
Mines always does that, as soon as I unplug it it jumps to 98%. Im hoping ARHD fixes this
Click to expand...
Click to collapse
ARHD, what is that?
nguyendqh said:
ARHD, what is that?
Click to expand...
Click to collapse
New Amaze Android Revolution HD ROM by mike1986?
This happens with many devices. I have not seen this yet on my Amaze but I am sure at some point it will happen. Try turning the phone off and charging it to 100% then power it on also try running the battery all the way down and letting it charge to full UNINTERRUPTED over night. If those dont help you can always try another rom with better battery management or go into a t-mobile store and get a battery replacement if your battery is still under warranty. Hope this helps
HTC does this on a lot of phones. It is a safety default to keep the battery healthy and safe. I had this issue with the Evo. The only way to fully charge a battery is to have other a wall charger or a SBC kernel.
its the best sense rom known to man in my opinion.
daswahnsinn said:
HTC does this on a lot of phones. It is a safety default to keep the battery healthy and safe. I had this issue with the Evo. The only way to fully charge and battery is to have other a wall charger or a SBC kernel.
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Click to collapse
My stock battery is 3.8v, and it only goes to 100% if I charge it in the phone. If I use my wall charger, it shows up at 99% when I put it back in my phone. I have two aftermarket batteries that show about 98% when charged from the wall. I am thinking that the phone charging circuit is set for 3.8v, and might possibly overheat the aftermarket batteries (3.7v). I saw one review that said these batteries melted the top of his SIM card. I'm not planning on trying that; I use the stock, charging every night, and swap the spares in if I run out of charge during the day.
I just remember hearing the same stories when I had my evo. You could charge for hours and unplug it and it would almost immediately drop to 99 or 98. So my previous statement may or may not help.
I charged mine over nite and woke up to it being 99%, left it for another hour or two and it hit 100%. I would say to leave it a little longer to get that last 1%.
Sent from my HTC_Amaze_4G using XDA App
For anyone who is running quicksense, if you want better battery life, charge your phone completely and go into recovery > Advanced> wipe battery stats. And done!
Sent from my HTC Amaze 4G using XDA App
RZJZA80 said:
I charged mine over nite and woke up to it being 99%, left it for another hour or two and it hit 100%. I would say to leave it a little longer to get that last 1%.
Sent from my HTC_Amaze_4G using XDA App
Click to expand...
Click to collapse
I find that if my phone its powered off while charging, it shows 100. If powered on, it shoes 99.
Sent from my Dell Streak 7 using xda premium
this is normal for lithium ion batteries...it also depends how the manufacturer perceives the battery...some manufeacturers say that your phone is 100 percent but it might only be around 95-98...overcharging lithium ions are bad...also some manufacturers say you have 10 percent left while you might actually have 15 or maybe to percent left...this is a fail safe method to shut off the phone and keep the battery from draining completely WHICH IS REALLY REALLY BAD FOR LITHIUM IONS...OVER CHARGING THE BATTERY IS BAD TOO...perhaps htc's thresh holds are a little different and actual to the real battery life.
also not a good idea to use your phone or any lithium ion device while its charging
powering off your phone to charge it overnight is the best idea to give you lithium ion a long life but this is not practical. this is why it says 100 percent when you turn off the phone and 99 when you're phone is off....it confuses the phone: " A portable device must be turned off during charge. This allows the battery to reach the set threshold voltage unhindered, and enables terminating charge on low current. A parasitic load (which means using phone or turning screen on while its charging) confuses the charger by depressing the battery voltage and preventing the current in the saturation stage to drop low. A battery may be fully charged, but the prevailing conditions prompt a continued charge. This causes undue battery stress and compromises safety."
http://batteryuniversity.com/learn/a..._ion_batteries
http://forum.xda-developers.com/showpost.php?p=19651965&postcount=7
One of the worst things you can do to a lithium battery is discharge it completely. They don't suffer from "memory" yet every time someone here in the forums complains that they are getting crappy battery life the instruction to discharge and recharge to 100% before clearing stats pops up.
For those who are interested here is an article that explains in detail.
batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
My main question- Is there some function in android that looks at the maximum depth of discharge level of the battery or is it that most people don't understand the characteristics of L-ion and confuse them with those of Ni-Mh or Ni-Cad?
I want to know because if I need to completely discharge to get better perfomance, despite the reduction in charge cycle lifetime, I will do it but only infrequently.
I've only let my battery discharge completely once, and it wasn't on purpose. From the posts I see here I think I get above average battery life. About 18 hours miui before I go for the charger and on 2.2 roms I'd get 20 hours and still have 40% or so to go. So no I don't think completely discharging your battery does anything for battery life.
Sent from my T959 using XDA App
I have never run mine down completely. Gotten it to about 6% but that was because I was fighting ROM flashing problems. I usually call 25-30% enough for me and plug in then. I am also getting 30 hours out of my 2.2 with a good deal of use. I used to have a Motorola and their batteries are total crap. If you EVER let it get down below 10%, it took some real work for it to charge correctly and boot up. Even as much as a hardware mod where I have had to cut the wires on a USB charge cord and charge it rigged up with the wires pressed against the battery and prongs in the phone. Very dangerous, but worked for a last resort.
Discharging the battery is not for the sake of the battery,but more so for the ROMs data and how it acquires the battstats usage. I only run it up and down and clear stats when flashing a new ROM, but I do use my phone moderate to heavy daily and have had great success in battery life the way I calibrate it.
The solution I think is to use a larger capacity battery and regulate it to narrower window of operation never fully charging or discharging.
The fastest killer though seems to be heat.
I have read several times that your phone does not fully discharge the battery...that there is still a minimal amount of charge,not enough for the phone to opperate but enough to not damage the battery when it shuts down
Maybe the batterystats file can be saved after being calibrated once and then restored after every wipe oor flash.. that would save some time aabd according to you guys, batt life too
Sent from a cell tower to the XDA server to you.
I've only ever calibrated my a few times and only after flashing a new rom. I never run my battery down after resetting the stats. I just use my phone as I normally do. My understanding of calibration is that it's not about squeezing more life out of the battery despite what most people think but of getting a more accurate measurement of the battery's actual charge. Also while it's true that the phone will shut of before the battery is completely discharged damaging the battery, allowing the battery charge to drop that low shortens your battery's life and decreases the amount of charge your battery can hold.
What gets me is I also read somewhere that for optimum battery life you should keep your battery level somewhere between 70%-40%. Of course that doesn't stop me from charging my phone to 100% everyday. I don't remember where I found that article but I'll post a link if I can find it again.
The reason this bad advice about completely discharging your battery persists is probably the same reason people keep recommending automatic task killers.
batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
ok, ok ill volunter, ill watch porn till my battery"discharges" At least my log will be interesting
radiohd said:
One of the worst things you can do to a lithium battery is discharge it completely. They don't suffer from "memory" yet every time someone here in the forums complains that they are getting crappy battery life the instruction to discharge and recharge to 100% before clearing stats pops up.
For those who are interested here is an article that explains in detail.
batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
My main question- Is there some function in android that looks at the maximum depth of discharge level of the battery or is it that most people don't understand the characteristics of L-ion and confuse them with those of Ni-Mh or Ni-Cad?
I want to know because if I need to completely discharge to get better perfomance, despite the reduction in charge cycle lifetime, I will do it but only infrequently.
Click to expand...
Click to collapse
Discharging the Battery & Running the Battery Dead is 2 Different things!
We recommend running the battery dead ( Phone Shuts Off ) & recharging while off to train the Android OS from Full > Empty..
Running the Phone until Dead is not Going to hurt the Battery in anyways shape or form despite what you may think or read!
The Reason is, the battery is never fully Discharge & still holds Voltage.. The Calculations of Charged / Dead is at the Kernel Level, so even when dead it still has a 3.4v still or roughly..
As long as the kernel isn't tampered with, discharging the battery via the Phone will never hurt the battery period!
Now, Based on the link you posted you would have to run the battery down past the safe discharge point.. Via some other means of killing the battery, other than using the Phone.
To help ease your mind, Remember this:
~ Charge levels is controlled by the kernel
~ Even when Phone powers off, there is still plenty of charge in the Phone's Battery
~ Battery is never Fully charged, as this also hurts lithium batteries
Roughly every Android kernel does not let lithium battery get below 3.4v and at most 96% charged.
Hope this helps,
~Eugene
If you are still concerned wait until your phone turns off and stick your battery on a meter. You will see there is still power left in it...
My original battery that came with the phone got great life, then couple of months later it was discharging in like 2-4 hrs(froyo), so I called, they sent another one free...5-6 months later that one started doing it as well, so I pulled out the old one from the drawer, it powered on at like 85% ! and I was getting crazy ass life out of it on miui over 30 hrs one time...now that one is acting up again, so I'm going to try to swap again..lol...maybe there's something to not using them for a while...
I've used diff roms and combinations of draining/recharging...calibrating, not calibrating...it's always different results..honestly I don't think there's any rhyme or reason to it other than the fact that many vibrants have diff hardware and there will always be some weird quirk on a per user basis...
As far as hurting it by draining it all the way, I hardly think that's the case seeing as with both batteries I've always let it run down...not on purpose but there has been many many times I've plugged in at 1% or had to power back on because it died...charged it up and got 20-30hrs no prob..usually issues come up when flashing a new rom...
i think it all comes down to luck of the draw. ive had my vibrant since launch day, and i still manage great battery life. my battery is actually stamped 7-02-2010. every 2 weeks or so ill drain the battery completely, turn it back on and allow itself to die again, and finally allow it to fully charge overnight or 4 hours. i usually get a good 7-8 hours of constant use on cm7, or over 24hours if let on standby.
im still debating if i want to grab an epic 4g touch battery as well to increase it even more.
qpinto said:
im still debating if i want to grab an epic 4g touch battery as well to increase it even more.
Click to expand...
Click to collapse
what's this about?
Epic 4g batteries are 1800 and fit in our vibes.
Dr.Stainedglove said:
what's this about?
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=1262035
in there they tested in a store since the epic 4g touch battery fit into a regular epic 4g, if it would fit into a vibrant. only thing is you have to put the battery in facing inside, and it fits and works 100%
Yeah the Epic 4G batteries fit in our Vibrant's. You can buy knock-off one's (that work well) for 19.99$ US! Here's a thread about it...
http://forum.xda-developers.com/showthread.php?t=1316492
Epic touch battery for the win. I've been rocking it for a few weeks. I was on miui and getting 14-16hrs. I recently went back to froyo and yesterday I got 12hrs off of a 67% charge.
Sent from my SGH-T959 using xda premium
dont know if people have seen this article but i thought it was pretty interesting about the battery stats file not actually needing to be deleted...
http://www.androidcentral.com/wiping-battery-stats-doesnt-improve-battery-life-says-google-engineer
jonen said:
dont know if people have seen this article but i thought it was pretty interesting about the battery stats file not actually needing to be deleted...
http://www.androidcentral.com/wiping-battery-stats-doesnt-improve-battery-life-says-google-engineer
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Click to collapse
Lol one of the biggest flukes in our forum haha.. people will harm their battery to calibrate it and it doesn't even do anything ...
Thank god I only calibrated once
sent from the xda app on my android smartphone.
I'm having this problem with my i777.
Sometimes when I reboot the phone the battery charge drops enormously, like 30% or so. For example, I will be doing things with the phone, the charge will be at something like 60% then reboot and right after reboot it says charge is 30% which doesn't make much sense.
this happens with the stock battery but the effects seems to be more pronouced with some batteries I bought on ebay.
Anyone has any idea what's going on?
what rom are you running on?
bartolo5 said:
I'm having this problem with my i777.
Sometimes when I reboot the phone the battery charge drops enormously, like 30% or so. For example, I will be doing things with the phone, the charge will be at something like 60% then reboot and right after reboot it says charge is 30% which doesn't make much sense.
this happens with the stock battery but the effects seems to be more pronouced with some batteries I bought on ebay.
Anyone has any idea what's going on?
Click to expand...
Click to collapse
Normal behavior of our fuel gauge hardware - high load (boot process) immediately after a reset confuses it and makes it report low. Effect is much more pronounced at lower states of charge.
pham818 said:
what rom are you running on?
Click to expand...
Click to collapse
Rooted stock 2.3.4
build number: GINGERBREAD.UCKH7
Entropy512 said:
Normal behavior of our fuel gauge hardware - high load (boot process) immediately after a reset confuses it and makes it report low. Effect is much more pronounced at lower states of charge.
Click to expand...
Click to collapse
That's exactly right. Tends to happen more on lower states of charge.
Does this mean that the charge indicator will go up after the reboot? Or maybe it will take longer to drop and the effective battery life will be the same.
Yes when this happens to me my bettery either dies extremely slow or my percent just goes up..
Sent from my SAMSUNG-SGH-I777 using XDA App
Smacdallas said:
Yes when this happens to me my bettery either dies extremely slow or my percent just goes up..
Sent from my SAMSUNG-SGH-I777 using XDA App
Click to expand...
Click to collapse
I see this too. I will be at ~40%, reboot and see 10%. Come back after a while to 12%, and it stays on 12% with like an hours worth of heavy use before going lower. If I look at the battery usage, it trends down, then drops, but stays level, then about when the trend would have been it starts dropping again.
I thought I just needed to calibrate the battery, as I just flashed a new ROM. But, it keeps doing this after a week, and several charge cycles.
Guess I'm relieved to see this weird behavior is not indicative of a problem.
Sent from my Galaxy S II (i777)
bartolo5 said:
That's exactly right. Tends to happen more on lower states of charge.
Does this mean that the charge indicator will go up after the reboot? Or maybe it will take longer to drop and the effective battery life will be the same.
Click to expand...
Click to collapse
Correct - because the gauge thinks the battery is lower than it actually is when this happens.
Attached a screenshot of the battery use with the big drop in effect.
I particularly think this is a bug and Samsung should fix this behavior.
It can't be changed without hardware alterations.
As with anything in engineering, there are tradeoffs. The positive aspect of this fuel gauge design is that it does not require ANY calibration. No wiping battery stats, no "always flash firmware at 100%" - none of that.
The negative is that in a few corner cases, it gets thrown off temporarily. This is basically the only known one.
Ive noticed this as well with both Stock and ICScreweD. I just try to reboot as least as possible.
greystealth said:
Ive noticed this as well with both Stock and ICScreweD. I just try to reboot as least as possible.
Click to expand...
Click to collapse
If you reboot at higher states of charge, OR reboot when on external power, you should not see this issue.
I just had this same problem lol. I was at 42% and when I rebooted my phone it dropped to 23%....This was a few hours after the OTA update to 2.3.6.
I had the same problem also.
-Battery would not charge to 100% ( it would charge between 97% -98%)
-Battery would drop 20% or 30% percent (when reboot).
I tried to recharge many times and cycles the battey but nothing would work.
I tried changing kernal, modem and roms . Nothing would work.
I actually thought i messed my phone up.
So i tried something that work for me.
1) i would let the battery drain till it was completely dead!
2) I would take battery out for 5 minutes.
3) put battery in and charge with phone OFF till it reaches 100%.
4) unplug charger from phone and take battery out and wait 5 minutes.
5) put battery back in and plug charger up and wait till phone marks 100% again ( This time the wait was longer to get to 100%).
6) i repeated step 5 untill finally the phone would mark 100% faster
7) unplug phone and then wait to see the battery status ( if your phone mark 99%) plug charger to phone and let it charge till it reaches 100% again. once it reach 100% reboot and repeat step 7 untill you reboot and it would show 100%.
not sure if this might work for anyone else but it did work for me. battery would charge to 100% and i don't have my phone drop 20-30 percent after reboot.
If it drops 20-30% on a reboot when the battery is near full, you may have a defective battery.
I've only seen major drops on reboot when the battery is low to begin with, never when at higher states of charge.
Doing a full discharge on Li-ion batteries puts a huge stress on it and greatly decreases the life of the battery. To get the longest life out of a battery, you want to generally stay in the medium range of charge (Don't over charge it, and don't discharge it too much). Cars like the Chevy Volt employ these techniques to encourage a longer battery life, however with phones, you get users that think discharging the battery all the way solves problems. If you want to see the true battery life that the fuel gauge averages from, press *#0228# in your dialer and check the battery voltage. Full is around 4.1v and discharged I believe is around 3.5v or so. (maybe 3.3? not sure)
3) put battery in and charge with phone OFF till it reaches 100%. <-- is probably what fixed it, and why I switch batteries instead of charging on my phone because the charger is able to control the current and voltage better than with a slight load on it (with phone on)
I'm sure that that user cut off at least 5% of his overall battery life with overcharging it like that though...
Same issues here pending the ROM I'm using.
4.2 volts is the upper limit for li-ion - and actually, it hits that at around 95% charge.
The method for charging Li-Ion:
Charge with a current limit initially - on our devices this is 650 mA.
Once you hit 4.2 volts, do NOT go above this - maintain voltage at 4.2 volts or lower regardless of current
Once current drops to around C/10 (on our devices, this is about 160 mA), shut off charging completely.
The phone's charge controller does this all automatically for you.
There's usually a timer/averaging filters in the final stages of charge termination - which is why "bump charging" can push a little extra into the battery - but this will lead to degradation in battery total capacity.
As somewhat of an extra trivia on Li-ion batteries, Motorola has apparently managed to get batteries that have nominal voltage at 3.8v and max charged voltage is around 4.3v as opposed to 4.2v.
Hunt3r.j2 said:
As somewhat of an extra trivia on Li-ion batteries, Motorola has apparently managed to get batteries that have nominal voltage at 3.8v and max charged voltage is around 4.3v as opposed to 4.2v.
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is it Li-ion tech though?
Sent from my SGH-I777 using Tapatalk
Firstly, I apologize if this is a total annoyingly noobish post, but I've not encountered this issue before.
Currently when charging, my phone hangs at 99% for over an hour before hitting 100% charge. Additionally, when not charging, the phone will hang at 9% charge for longer than expected and rapidly deplete below 9%.
Info that may be pertain to the problem:
When I got my Rezound and the extended battery, the first thing I did was root the phone and flash Amon Ra.
I waited for the battery to fully charge, then I flashed CleanROM Kang Tapped Edition. I finished my general phone setup and app install stuff and had about 15% battery left (it was now about 8am, pulled an all-nighter.)
An hour later, I get a phone call and what amounted to literally 9 straight hours of phone talk time with only that small amount of battery left. I had to be plugged in pretty much the whole time and I think when I had under 10% battery when I finally got off the phone.
I have tried wiping battery stats after hitting full charge in Amon Ra as well as using the battery calibrator app. After I fully charged and cleared stats, I waited for the phone to deplete the battery before fully charging (I try to let it charge uninterrupted).
The issue still seems to behave exactly the same. Is it possible that I messed up the battery some by talking with low charge and plugged in for 9 hours?
Thanks in advance for any info or advice.
Try reflashing your ROM. I had the same issue with my phone. Assuming your rooted, try zep's battery calibrater script.
Sent from my VS910 4G using xda premium
keynith said:
Try reflashing your ROM. I had the same issue with my phone. Assuming your rooted, try zep's battery calibrater script.
Sent from my VS910 4G using xda premium
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I am rooted. Looking inside the Die Hard Battery Calibrator script seems to just clear battery stats, which, I believe, happens when the phone is fully charged anyways.
I have been trying the app "Battery Calibration", which also clears battery stats.
There is also the option to wipe battery stats from Scott's tweaks, as well as Amon Ra.
I guess after all the conflicting viewpoints I've heard regarding battery stats, I'm about as confused as ever. I thought that battery stats merely stores data about the power usage, and doesn't actually affect how the OS reads the battery percentage. It boggles me that the OS wouldn't just know the battery voltage, and therefore the remaining charge. Unless batteries have varying voltage (like the Rez 3.7V battery vs the 3.8V battery), this should be more accurate than whatever the hell it is doing.
I'll give the script a shot, I'm just perplexed.
Anybody know of a widget that shows just the mV? Then I can forget about these darn percentages.
*EDIT* Battery Monitor Widget can do mV, among other things.
I wonder if I should try the HTC method contained in the link below:
http://forum.xda-developers.com/showthread.php?t=712990
Here is some word on battery stats from a Google employee:
https://plus.google.com/105051985738280261832/posts/FV3LVtdVxPT