Database Info

Battery to blame for some reboots?

just had a thought, my g2x just started rebooting like crazy i.e it would get to the tmobile g2x android start up animation and after it finishes it would reboot. my battery was around 30%-35% at the time i was thinking maybe the battery cant maintain a decent voltage and it falls below the g2x voltage threshold while under load and boom instant reboot. this could also explain why some batteries heat up to hot as well, they dont have a high enough discharge rate to keep up with the demands of the phone.
this can be solved one of two ways get a larger capacity battery of the same discharge rate. or get a higher discharge rate battery of the same size. both of those will allow the phone to draw more power without overtaxing the battery and would keep the battery cooler as well.

I wouldn't be surprised if the battery drivers are the culprit for all our issues. The phone can't properly read the battery charge and so the battery overheats or the phone reboots itself in hopes of getting a better reading on the battery.

i noticed my phone starts to heat up when the battery level hits around 40%. i never really understood why.

Mine once rebooted when it was plugged in and 100% charged. I think when it's plugged in it draws power from charger not the battery. So your theory, if true, only explains some reboots, not all.
Sent from my LG-P999 using XDA Premium App

rhinology said:
Mine once rebooted when it was plugged in and 100% charged. I think when it's plugged in it draws power from charger not the battery. So your theory, if true, only explains some reboots, not all.
Sent from my LG-P999 using XDA Premium App
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I may be mistaken, but if it was in fact 100% then it was probably drawing from the battery at that point. I believe that once they reach 100% they will cycle between battery usage and charging.

well i know from using lipo batterys in my r/c planes and cars that if you draw them below 3v it can damage the battey im not sure what Li-ion low voltage is but its near the same basicly once the battery hit around 3.6 volts at rest its empty and will not hold voltage at all.
and for the 100% full charge if the battery drivers is fubar it could be overcharging your battery and damaging it so it has less capacity so when it pulls a draw it cant keep up and reboots

I plug my phone in every day before going to bed, and unplug it in the morning. If G2x doesn't have overcharging protection my battery would have been damaged long ago.
Also, I used the phone several times when it was charged 100% and still plugged in, never saw battery percentage went to 99% then back to 100%. So I believe when 100% and plugged in, it won't cycle power source through battery and charger.
Sent from my LG-P999 using XDA Premium App

I will add a little information that may or may not have relevance. I have 4 batteries for my G2X (This is my solution to the short battery life). The LG battery, $25 AceSoft battery, and two $6 generic Chinese batteries. None of them including the dirt cheap ones cause my phone to reboot. Conclusions can be drawn from this information but I'm going to leave that up to someone else. If you want to test the battery hypothesis I suggest you buy some of those cheap batteries off of eBay and see if something changes. Would be a rather inexpensive experiment.

I agree, ever since I started using a 1900mah battery from ebay, the random reboots and freezing issues have disappeared completely, and I have been using the phone for almost a month now. Please try a different battery to get rid of random reboots and overheating issue. Hope it will help someone.
Sent from my LG-P999 using XDA App

you know what, I bought 3 ebay batteries so I can swap them around if i don't have a charger. none of them did the black lock screen. weird.

I had random reboot issues using some of the custom roms + original battery.
Then I bought a charger + batteries off ebay, and reset to original rom, and havn't had a single reboot/freeze since.

i just had my second reboot in cyanogen with my battery at 32% after if rebooted it went back up to 45%. i was playing galaxy on fire 2 when it rebooted. and according to battery monitor it was pulling 931mA when it rebooted.
i think the battery discharge rate is substandard for this phone this is a high performance phone and you cant just stick a normal cell phone battery in and expect it to work. this is in part why some of the reboots are happening and why when people got new battery they problem went away for them.

You might be on to something. Everytime my phone restarts it is because it is overheating.
Sent from my LG-P999 using XDA Premium App

i wish we had more info on the batterys lg used like the discharge rate and everything. i bet they are .5c or 1c discharge that would be why they overcheat when under heavy use or charging

I got a replacement battery from T-Mobile this past Tuesday, and had two random reboots within an hour. However, since then, I haven't had one issue. 4 days and counting going strong... Knocking on wood. Phone is stock and rooted.

well i know cm fixed the battery should be in his next build also data speeds with gingerbread, should be build 54 not 53, something is wrong with 53 and root access so they are going to have it fixed im pretty sure in 54, here peep this via twitter.........
@CM_arcee RC
My dark magical powers have beaten the G2x's radio into submission. Starting tonight, p999 gets a battery meter and twice the data speed
3 hours ago via web

while that is awsome news i dont think the battery meter for the phone is really the problem it happens when the draw on the battery pulls it below 3v under load the batterys low voltage cutoff kicks in and shuts the phone off and then the spings back up and the phone restarts

I think it could be the chargers causing issues. My gf pulled my g2x charger out of the box and said it made her phone whacky and died after a few hours.
Her comment made me think about it.
I never had battery issues but I use my old nexus one and zune charger.
Food for thought
Sent from my LG-P999 using XDA Premium App

My wall charger is bad, out bricks the phone every time I use it. Have to charge via USB.
Sent from my LG-P999 using XDA App

Issues regarding battery charging, won't fully charge.

Ok, so I've been experiencing this for the past few weeks now, and I'm getting sick of it. I plug up my phone to charge it overnight, or just to charge it when I know I will be in a place for a while. After a while, the phones battery will say 100%. But when I take the charger out, the battery isn't fully charged. It IMMEDIATELY jumps down to around 40% - 70%. I can get it fully charged after unplugging and replugging the charger in, sometimes numerous times of unplugging and replugging. Also, my battery has died on numerous occasions on between 10% - 15%. I calibrated my battery the first day I got it (as a replacement) and got decent juice from it, a noticeable improvement from the old battery. Am I the only one experiencing these issues? Is there a fix for it???
*NOTE* I'm on my 2nd battery (replacement) and this is also a replacement phone. Also running GummyCharged 1.8 GBE on EP1Q, RFS, w/Minimal Gummy theme, if that matters. Also, its not just my phone, my wifes Charge phone has the same setup and it does it also. So it may just be something wrong Gingerbreak. Never did it on FroYo. Gonna Odin back to FroYo and report back.
Sent from my Droid Charge, GummyCharged 1.8 GBE, Minimal Gummy v1.1 theme.

This is because you cannot leave the phone plugged in to charge for an extended period of time. Once the battery reaches 100%, it stops charging. It will start charging again later, after the percentage goes down to a certain set level. This is why you have the huge initial drop-off after taking it off the charger. If you want to leave the phone plugged in for an extended period of time, turn it off and plug it in to allow it to charge, then it won't discharge as quickly. Otherwise, this is normal behavior for all android phones, and trying to make it so that the phone stays at 100% full charge is bad for both the battery and phone.

I've been having some strange problems. My phone will die with between 4-8 percent battery left. I can turn it back on and once it drops another percent or two it will turn off again. I have calibrated it and my battery life is good but this is a strange issue. Upgrading to rc2 today.
Droid Charge/Gummy 1.9RC 2.3.4

youngpettyboi said:
Ok, so I've been experiencing this for the past few weeks now, and I'm getting sick of it. I plug up my phone to charge it overnight, or just to charge it when I know I will be in a place for a while. After a while, the phones battery will say 100%. But when I take the charger out, the battery isn't fully charged. Its usually on around 40% - 70%. I can get it fully charged after unplugging and replugging the charger in. Also, my battery has died on numerous occasions on between 10% - 15%. I calibrated my battery the first day I got it (as a replacement) and got decent juice from it, a noticeable improvement from the old battery. Am I the only one experiencing these issues? Is there a fix for it???
*NOTE* I'm on my 2nd battery (replacement) and this is also a replacement phone. Also running GummyCharged 1.8 GBE on EP1Q, RFS, w/Minimal Gummy theme, if that matters.
Sent from my Droid Charge, GummyCharged 1.8 GBE, Minimal Gummy v1.1 theme.
Click to expand...
Click to collapse
'
I have the exact same problem. It will just go from 50% to 100% in a second and then unplug and plug back in to make it work. i haven't been able to figure it out either. 2nd phone and 2nd battery as well with same issue. I guess it has to do with my habits somehow.

imnuts said:
This is because you cannot leave the phone plugged in to charge for an extended period of time. Once the battery reaches 100%, it stops charging. It will start charging again later, after the percentage goes down to a certain set level. This is why you have the huge initial drop-off after taking it off the charger. If you want to leave the phone plugged in for an extended period of time, turn it off and plug it in to allow it to charge, then it won't discharge as quickly. Otherwise, this is normal behavior for all android phones, and trying to make it so that the phone stays at 100% full charge is bad for both the battery and phone.
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Click to collapse
I believe the use case he is suggesting is a little different than what you are describing. When the phone is plugged in at say 12%, it charges for a while and gets to say 63%. At that point it jumps to 100% immediately. The phone must then be unplugged from the charger and re-plugged in and then it will continue properly to 100%.
Hopefully that is a little clearer.

I mean, usually I turn it off to charge. And I have that No Moar Powah app installed. So I set it to reboot at 100%, it does and when I take the charger out, it immediately drops to between said percentages. almost like clockwork. Very annoying. I understand what u mean Imnuts, but my Vibrant, HD2, or others never experienced this issue. Also, my first Charge, would keep a charge if I left it on the charger once it hit 100%. Maybe an issue with the charger itself? A Verizon rep told me to bring in the charger itself if the issue persists.
Sent from my SCH-I510 using XDA Premium App

Almost exactly my issue. I'm not understandings what the problem is. I'm assuming u have that issue also???
Sent from my SCH-I510 using XDA Premium App

Hmm i have the opposite of that problem every time i unplug my phone from charging overnight the battery meter would always read 100% never below that.
Also does anyone know which battery meter i should follow for battery calibration? The battery meter in the status bar, the battery level in system settings/about phone/status, the battery percentage at the lock screen or the battery meter on the screen when the phones off? They're all giving me different readings for some odd reason.

Sometimes I get that too, but for the most part, its the false readings from the lockscreen, and the about phone settings. I may send off for a new phone, run stock for a few days to calibrate my battery then root on a full charge.
Sent from ur moms room... With my Droid Charge ;-)

imnuts said:
This is because you cannot leave the phone plugged in to charge for an extended period of time. Once the battery reaches 100%, it stops charging. It will start charging again later, after the percentage goes down to a certain set level. This is why you have the huge initial drop-off after taking it off the charger. If you want to leave the phone plugged in for an extended period of time, turn it off and plug it in to allow it to charge, then it won't discharge as quickly. Otherwise, this is normal behavior for all android phones, and trying to make it so that the phone stays at 100% full charge is bad for both the battery and phone.
Click to expand...
Click to collapse
I see what you're saying, but on the other hand I charge my phone overnight with no problems. Never did this before, but I don't have time to sit around for 6 hours for it to charge
Sent from my SCH-I510 using XDA App

Well I went back to FroYo GummyCharged v1.9 and lo and behold, the charging issues VANISHED. Charged my phone overnight last night and when I removed the charger, 100%. No drop immediately back down to 56% or some weird number. Maybe its a Gingerbreak leak issue. I've noticed that it only happens to my phone on Gingerbread. Also must mention, my wifes phone does it also. She's on Gingerbread. She complains that I broke her phone lol.
*EDIT* CONFIRMED. 2nd nite in a row, no issues charging.
Sent from my SCH-I510 using XDA Premium App

imnuts said:
This is because you cannot leave the phone plugged in to charge for an extended period of time. Once the battery reaches 100%, it stops charging. It will start charging again later, after the percentage goes down to a certain set level. This is why you have the huge initial drop-off after taking it off the charger. If you want to leave the phone plugged in for an extended period of time, turn it off and plug it in to allow it to charge, then it won't discharge as quickly. Otherwise, this is normal behavior for all android phones, and trying to make it so that the phone stays at 100% full charge is bad for both the battery and phone.
Click to expand...
Click to collapse
Imnuts...ill have to disagree with you. This is the only android phone I've had this problem on, and I've had 6 different android phones. also, it only started happening for me when i went to Gingerbread. Going to flash back to Froyo and i will update.
Sent from my SCH-I510 using XDA App

Same here with me. It only started when I went to Gingerbread. Also happened on my wifes phone, also on GB. I went back to FroYo 2 days ago, and boom, no more charging issues. I can leave it on all nite and not get the random percentage drops. I gotta calibrate my battery now.
Sent from my SCH-I510 using XDA Premium App

Flashed back to Froyo and charged overnight, unplugged an hour ago and now I'm sitting at 96%.
Gingerbread be buggin' yo.

scriz said:
Flashed back to Froyo and charged overnight, unplugged an hour ago and now I'm sitting at 96%.
Gingerbread be buggin' yo.
Click to expand...
Click to collapse
So it was a Gingerbread bug (GingerBug???) right? My battery life seems way better also. 6+ hrs off the charger and I am sitting on 73%. Not bad for me.
Sent from my SCH-I510 using XDA Premium App

The mis-information in this thread regarding Li-ion batteries is getting out of hand.
I think many of us are thinking about ni-cad batteries in which all the "bad" things we are talking about in this thread apply.
for a Li-Ion Battery, there is no "memory" effect. this means you can charge it at any point during the discharge phase. You also do not need to allow the battery to drain fully and charge to full to "condition" the battery. Li-Ion batteries can be charged at any point up to any point (from 30% to 70%, then 50% to 90%) and it will not effect the batteries performance.
Li-Batteries also do not suffer from overcharging. The charging circuits in cell phones will charge the battery until it is full, and then trickle charge from then on. And because Li-ion batteries do not have memories, this type of charging will not effect performance.
Li-Ion batteries can only be charged a finite number of times. However, the number of times does not translate to the number of times you happen to plug it in. The batteries have a rated number of "charge cycles", this is when the power from the battery has been exhausted and then re-filled. If you always charge your battery at 50% - 100% then every 2 charges you are using 1 full charge cycle. The batteries in the charge are 1600mAh and have approx 500 charge cycles. if you discharged and charged your phone from 0 to 100% every day, your battery would last 500 days before it would start to suffer from poor performance.
the OP in this thread is having software related issues related to the phone mis-representing the correct charge level of the battery, and then stopping the charge cycle prematurely.
Remember, it is perfectly OK, and expected of you to charge your battery as many times as you need to. Keep the thing on the charger any chance you get, it is not going to hurt it, its designed to be used that way. This is why Li-Ion took over as the battery tech of choice compared to Ni-cad.
References:
http://en.wikipedia.org/wiki/Lithium-ion_battery (not a definitive reference, just a starting point for people interested)
http://www.geek.com/smartphone-buyers-guide/battery/ (A Few good sentences in this about the topic
http://www.apple.com/batteries/ipods.html (Another good source, Ipod also uses li-ion batteries - as do almost all consumer electronics)
Experience:
Electrical Engineer/Nuclear Physics Double Major
UC Davis, California
College of Engineering

msticlaru said:
The mis-information in this thread regarding Li-ion batteries is getting out of hand.
I think many of us are thinking about ni-cad batteries in which all the "bad" things we are talking about in this thread apply.
for a Li-Ion Battery, there is no "memory" effect. this means you can charge it at any point during the discharge phase. You also do not need to allow the battery to drain fully and charge to full to "condition" the battery. Li-Ion batteries can be charged at any point up to any point (from 30% to 70%, then 50% to 90%) and it will not effect the batteries performance.
Li-Batteries also do not suffer from overcharging. The charging circuits in cell phones will charge the battery until it is full, and then trickle charge from then on. And because Li-ion batteries do not have memories, this type of charging will not effect performance.
Li-Ion batteries can only be charged a finite number of times. However, the number of times does not translate to the number of times you happen to plug it in. The batteries have a rated number of "charge cycles", this is when the power from the battery has been exhausted and then re-filled. If you always charge your battery at 50% - 100% then every 2 charges you are using 1 full charge cycle. The batteries in the charge are 1600mAh and have approx 500 charge cycles. if you discharged and charged your phone from 0 to 100% every day, your battery would last 500 days before it would start to suffer from poor performance.
the OP in this thread is having software related issues related to the phone mis-representing the correct charge level of the battery, and then stopping the charge cycle prematurely.
Remember, it is perfectly OK, and expected of you to charge your battery as many times as you need to. Keep the thing on the charger any chance you get, it is not going to hurt it, its designed to be used that way. This is why Li-Ion took over as the battery tech of choice compared to Ni-cad.
References:
http://en.wikipedia.org/wiki/Lithium-ion_battery (not a definitive reference, just a starting point for people interested)
http://www.geek.com/smartphone-buyers-guide/battery/ (A Few good sentences in this about the topic
http://www.apple.com/batteries/ipods.html (Another good source, Ipod also uses li-ion batteries - as do almost all consumer electronics)
Experience:
Electrical Engineer/Nuclear Physics Double Major
UC Davis, California
College of Engineering
Click to expand...
Click to collapse
This coming from a person WHO KNOWS WHAT HE IS TALKING ABOUT is very beneficial to us. Knowing that there is no way to actually "condition" a Li-Ion battery means that us who are actually suffer from poor battery life either have defective units or defective batteries. I hear of this miraculous 2 day battery life, yet I struggle to get thru a full 7 or 8 hrs with moderate usage. And this is a replacement unit AND battery. None of my other phones had that issue of immediately droping percentages like that, so I figured it was a software issue, that's why I went back to FroYo to test it out. Seems I was right. Gingerbread has a software issue that keeps the battery on some phones from reaching a full charge. Also my phone would be boiling hot during the charging process. Since reverting back, I've had no issues. Thanks for the insight. Coning from a knowledgeable source, it means a lot. Thanks!!!
Sent from my SCH-I510 using XDA Premium App

Purposely drained battery, charged for 2 minutes, restarted, now at 50%

I'm on CM10 8/31 and I've been noticing that my battery life has been really poor lately, so I wanted to find out what the problem was. I thought about draining my battery fully and then charging it again. Once I drained the battery, I charged it, and restarted the phone after the charging began. Once the phone booted, it reported a 50% or so charge. I'm wondering if my phone is stuck at reporting battery at half capacity, and that when it charges to 100%, it's actually 50%. Anything I can do?
EDIT: Also, I should note that the battery has sometimes spiked up/down by about 20% after a reboot (including today before the drain).

This phone has a fuel gauge chip, fully discharging and recharging will not calibrate it. False readings after reboot are common, you may even notice it will climb back up as it begins to accurately reflect level.
There are apps to let you know what is causing drain. BetterBatteryStats and CPUSpy are recommended a lot.

ALBGunner04 said:
I'm on CM10 8/31 and I've been noticing that my battery life has been really poor lately, so I wanted to find out what the problem was. I thought about draining my battery fully and then charging it again. Once I drained the battery, I charged it, and restarted the phone after the charging began. Once the phone booted, it reported a 50% or so charge. I'm wondering if my phone is stuck at reporting battery at half capacity, and that when it charges to 100%, it's actually 50%. Anything I can do?
EDIT: Also, I should note that the battery has sometimes spiked up/down by about 20% after a reboot (including today before the drain).
Click to expand...
Click to collapse
Entropy doesn't frequent our forum much anymore, but he left some nuggets of wisdom behind.
As you have probably seen, he mentioned several times that generally our fuel gage doesn't need much attention. It may get a little out of whack if you have heavy usage followed by reboot, but generally the error is short-lived and goes away quickly (within an hour or so).
But apparently sometimes the fuel gage gets really confused, and in that case you can reset it (to un-confuse it) by powering down and pulling battery for 20-30 seconds. It certainly can't hurt to try.. that's what you try for any computer that was acting weird. That was discussed by Entropy here:
http://forum.xda-developers.com/showthread.php?t=1209087&highlight=+gingerbread+fuel+gauge+
By the way, here is a link to the fuel gage chip (MAX17040) used in Infuse
http://datasheets.maximintegrated.com/en/ds/MAX17040-MAX17041.pdf
It has a heuristic model of the battery. The only input is the battery voltage. So it looks at time history of voltage and provides an output signal. Exactly what the output is I’m not sure. You’d think it would be an estimate of %. But according to the circuit diagram there is no inputs to the MAX17040 other than battery voltage.
And yet our phone also knows when it’s charging. And our Infuse phone also has a sensor that enables it to measure current while charging (but not to measure current while discharging). This according to the developer of Battery Monitor Widget:
http://forum.xda-developers.com/showthread.php?p=31295223&highlight=infuse#post31295223
Why the heck would we not use sensed charging current and charging status as an input to calculating our % battery (since the signal does not go to the Max17040)? Beats me, doesn't make sense. Maybe the output of he fuel gage chip goes to the integrated power chip MAX8998 which looks at these other inputs (charging status and charging current) and develops the % estimate... I’m not sure.

Battery And Charging problem

hello,
I started charging my tab, it got charged till 99% and then i kept on charging it but it didnt went above 99% so i thought may be its because i am using the cell. So i switched it off and kept on charging , The battry icon was charging towards the end part (like the last 10% is getting charged) but in brownish yellow collor (sort of dark orange color) i kept it for charging in this way for like an hour.. Still when i turned on the tab, its 99%. Why so??
I havent rooted it yet! its total stock..
Bought it just 5 days ago..

About half the time, my tab will only go to 99%. Since it's only1% I've never given much thought to it, but I do experience the same problem from time to time.

Tel864 said:
About half the time, my tab will only go to 99%. Since it's only1% I've never given much thought to it, but I do experience the same problem from time to time.
Click to expand...
Click to collapse
after reaching to 99%. How long does your tab works??? Are you using p3100 too??

mhrsolanki2020 said:
after reaching to 99%. How long does your tab works??? Are you using p3100 too??
Click to expand...
Click to collapse
I'm using a p3113. I've never noticed much difference in how long it lasts. Most days, my tablet will last all day whether it charges to 99% or 100%. You really shouldn't see any difference to speak of between a 100% charge and a 99% charge. I personally think it's an overcharge feature to keep it from overcharging. I've actually seen it jump from 100% to 99% one time. If that's the case, then it's a good thing. You could try to bump charge it like I've done to cellphones that won't fully charge. I really wouldn't recommend it since 1% is practically nothing.
Charge it up (powered on) until it's finished.
Unplug it, and turn it off
Plug it back in to charge (still powered off) again, until it says it's finished.It will continue to charge now.
Now unplug it and turn it back on.
Plug the charger back in (powered on) and charge until it says it's finished.
Keep doing this until when you have it powered on, it should say 100%.

mhrsolanki2020 said:
after reaching to 99%. How long does your tab works??? Are you using p3100 too??
Click to expand...
Click to collapse
The battery charging end is defined with two parmeters: the battery voltage reach a voltage close to 4.2 V and the battery charging current gets under 200mA ( a value I have estimated on my 5110 model) .
If for some reasons the residual current do not get under this limit value ( # 200mA) while the maximum battery voltage is reached , the state of charge stay screened at 99% !!!!!
The 4.2V battery voltage is a safety limit that a Li-Ion battery should not exceed. Most often the battery voltage is stabilized close to this value at the last stage of the charging cycle and the internal charging progam decide that the charging cycle is finished when the battery current gets under a predifined value.
I have given some examples of charging cycles of different smartphones in my blog : http://78michel.unblog.fr (sorry most examples are in french).

Tel864 said:
I'm using a p3113. I've never noticed much difference in how long it lasts. Most days, my tablet will last all day whether it charges to 99% or 100%. You really shouldn't see any difference to speak of between a 100% charge and a 99% charge. I personally think it's an overcharge feature to keep it from overcharging. I've actually seen it jump from 100% to 99% one time. If that's the case, then it's a good thing. You could try to bump charge it like I've done to cellphones that won't fully charge. I really wouldn't recommend it since 1% is practically nothing.
Click to expand...
Click to collapse
7_michel said:
The battery charging end is defined with two parmeters: the battery voltage reach a voltage close to 4.2 V and the battery charging current gets under 200mA ( a value I have estimated on my 5110 model) .
If for some reasons the residual current do not get under this limit value ( # 200mA) while the maximum battery voltage is reached , the state of charge stay screened at 99% !!!!!
The 4.2V battery voltage is a safety limit that a Li-Ion battery should not exceed. Most often the battery voltage is stabilized close to this value at the last stage of the charging cycle and the internal charging progam decide that the charging cycle is finished when the battery current gets under a predifined value.
I have given some examples of charging cycles of different smartphones in my blog : http://78michel.unblog.fr (sorry most examples are in french).
Click to expand...
Click to collapse
So I should stop charging when its 99%?
How many hours does ur tab lasts after charging 99% ?? Cuz mine doesnt lasts even 4 hours .. never charged 99% (just bought it somedays ago) did it yest , its working well now .
Screen takes too much battery ,.. ny way arround it to have better batery life? i saw CM10.1 but it has probs with gsm device so I m not using it ..

mhrsolanki2020 said:
So I should stop charging when its 99%?
How many hours does ur tab lasts after charging 99% ?? Cuz mine doesnt lasts even 4 hours .. never charged 99% (just bought it somedays ago) did it yest , its working well now .
Screen takes too much battery ,.. ny way arround it to have better batery life? i saw CM10.1 but it has probs with gsm device so I m not using it ..
Click to expand...
Click to collapse
hello friend me too got gtab2 few days back.couple of days back i left charger connected full night and next day i saw on screen "battery fully charged unplug charger"my tab last full day when i return home its around 30%.abt ur battery life i doubt may be some apps are consuming or may be continue wifi use?if this is not issue then u must report this problem to cc coz 4 hrs backup is very less

mhrsolanki2020 said:
So I should stop charging when its 99%?
Click to expand...
Click to collapse
I think it is better for the battery life to stop charging if the state of charge level stay on 99%, because the charging current is maintained continuously in the battery and I think this is not so good for the battery life.
You can check the battery current in the battery with diffrents battery monitoring systems. I use Battery Monitor Widget. This is very convenient app. to analyse the charging cycle and the draining of the battery.
Analysis of my 5110 here: http://78michel.unblog.fr/samsung-galaxy-tab-2-10-1-tests/
The screen of these tablets is the most current draining component. At max screen brigthness the battery life is a less than 6 hours on my 5110. The brightness should be setted as low as possible to improve battery life, other componenet such as WiFi... GPS have very low impact on the battery life.....

Phone charging at 100% for around 15-30 minutes

Hello. I just noticed something weird on my TCL 10L phone. When the phone reaches 100%, it displays fully charged on my lockscreen. Though, unlocking the phone I see the phone is still charging. I see the battery bar being green with a charging bolt. It takes around 15-30 minutes until it says charged (and the bolt removed). Is this normal? I do not remember the phone doing this when I bought it around 5 months ago.

Changes in charging and especially sudden loss of capacity can indicate a battery failure.
Check for cover swelling/bulging, battery swelling is a failure, replace asap if so.
A failure this early is rare but Li's can fail at any time in their life.
Inspect jack and port for contamination. Use a known good charger and cable. Try cycling the battery until the phone shutdown then charge to 100%, repeat... to calibrate battery indicator.
Minimum start charging temp is 72F
Best start temperature is 82-90F
Never attempt to charge a Li below 40F
Keep battery temperature below about 101F when charging.
Do not use phone while charging as it will skew the charging curve.

Thanks for the reply. There is no battery loss. I can play games on this device, browse, and check apps and drain the battery in the same period I did since I got it. I actually charged it to 100% since went to sleep. 9 hours later the device was still at 100%. 1.5 hour of playing a game after that and the battery was down to 84%. The issue is really weird. I am thinking a battery calibration may help. I do not know.
P.S. I am currently using Android 10 and I do not want to switch to Android 11.

I wouldn't worry about it.
It's best not to charge to 100%.or below 30%.
Lu's like frequent midrange power cycling (40-65%).
As for 11, no way that crapware is getting on my phones....

blackhawk said:
I wouldn't worry about it.
It's best not to charge to 100%.or below 30%.
Lu's like frequent midrange power cycling (40-65%).
As for 11, no way that crapware is getting on my phones....
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Did you personally experience this on any device? This is the first time I saw something like this. According to some articles the phone may display wrong battery stats. So I was thinking calibration would be a solution to this issue.