don't know if someone point out this already..
impressed by the short battery life of my Atrix, definitely lower than i expected, i make this try, and that's what i found out..
if you full charge the battery (phone shows "charged" or "100%" if you charge it when off) , then pull it out WITHOUT disconnect the usb charger, the phone reboots, then it shows a big picture of a battery with a question mark in it.. if you put in the battery again, the charge is stuck at 60%, and it takes about another hour to get the battery full..
so it seem that the phone think that battery is full, and stop charging it, when in fact it isn't..
if someone had a Motorola Milestone before, this was a known bug, due to the motorola kernel, who was solved only by some later Roms..
i haven't yet tested if using this, battery life is effectively longer, (just discovered), but with Milestone it was. a lot.
maybe our battery life can be better than it is now, if we can make phone recognize the full charge when it realy is..
P.S. i'm on stock At&T froyo.. if this was solved by latest kernel and Gingerbread i'm sorry for the useless post..
i can confirm my battery life improved after charging my phone in that way, like it was with Milestone and according to what i expected..
in fact, to charge a 1900 mA battery with a 850mA/h wall charger, it MUST takes, in a perfect world without energy dissipation, about 2h20' from discharged.. don't know about your, but my Atrix normally takes less, so it seem more than probably that it isn't really full charged
still waiting someone who test this on Gingerbread.. hope this issue's gone..
divicos said:
still waiting someone who test this on Gingerbread.. hope this issue's gone..
Click to expand...
Click to collapse
Just tried it on GB 4.5.91, when I popped the battery back in it said it was at 5%. It's charging up now, I'll update when it's done charging up...
If you have CWM you can clear the battery stats, then use Battery Calibration to fully charge and calibrate. I usually leave the phone charging for about 15 minutes after I get the fully charged message, then calibrate.
CaelanT said:
If you have CWM you can clear the battery stats, then use Battery Calibration to fully charge and calibrate. I usually leave the phone charging for about 15 minutes after I get the fully charged message, then calibrate.
Click to expand...
Click to collapse
So you reckon his battery isn't calibrated. If yours is, can you perhaps try what he suggests & report back? That'd be useful!
(I'm calibrating mine right now otherwise I would have tried..)
privatedoodle said:
Just tried it on GB 4.5.91, when I popped the battery back in it said it was at 5%. It's charging up now, I'll update when it's done charging up...
Click to expand...
Click to collapse
Same here, how did you go?
Mine seems to be stuck on 5%
If I boot the phone, its 100% and 4200mV but as soon as I unplug it it goes to 99% and 41** mV
h0mbre_au said:
Same here, how did you go?
Mine seems to be stuck on 5%
If I boot the phone, its 100% and 4200mV but as soon as I unplug it it goes to 99% and 41** mV
Click to expand...
Click to collapse
That's where I was for a long time (stuck at 5%), so I decided to calibrate the battery then give it another go. Right now the battery is draining, hopefully by tomorrow I'll have some results worth posting...
EDIT: After recalibrating, draining, and recharging, the battery still says 5% when you pull it and replace it. I'm charging up overnight, will update again tomorrow.
2ND EDIT: Charged for about an hour and a half, and it went up from 5% to 15%. After another 7 hours, it was still at 15%. Looks to me like a glitch in how the phone reads the battery, but don't know how much it's actually affecting battery life.
Today's my first day trying Green Power, so we'll see how that does.
so it seems Gingerbread acts in a different way..
maybe this bug was solved, with latest kernel, since if you're stuck on 5% and don't increase, phone is definitely NOT charging... it seems that it doesn't well recognize the amount of charge, but probably it is full..
i repeat, mine goes from 60% (when i pull and put the "charged" battery) to 100% in about an hour, bringing the total time of charging to 2h 15', that is how it needs to charge a 1900mA @850mA/h...
it's maybe simpler to check if it was solved or not.. if your phone takes about that time to full charge, we can assume that's act properly..
will try the calibration, thanks for the hint..
Related
I'm looking to calibrate my battery on my Epic (epic experience froyo.) I am not sure how to do it and I cant seem to find a thread. Any help would greatly be appreciated. Thanks
Charge your phone to 100%.
Boot into Clockwork recovery.
Advanced>Clear/Wipe Battery Stats
Boot up and start using your phone. Use it until it dies.
Charge back up to 100%, not interrupting the charging.
Your battery is calibrated.
my battery charges to 97% and the blue led comes on. is that 100% but displays 97?
odd...now it charged to 100...lol im so confused
Is there a fast way to drain it to zero?
Or does draining it faster than average use cause calibration to be off?
Sent from my SPH-P100 using XDA App
Battery calibration is covered in a few different places on multiple threads.
warlar12 said:
odd...now it charged to 100...lol im so confused
Click to expand...
Click to collapse
muyoso is right - I do that 2-3 times to define the trough and crest (valley and peak) of battery life.
It isn't good for the battery health to drain it past the point it first shuts off (so don't turn it back on until its powered externally). It also isn't good for battery health to overcharge (er, "bump" charge it repeatedly to full).
So when you get to 100% (or when it tells you its "full" - may appear as 97 or 98 - just follow the pop-up) its ready to be unleashed.
Of course, I didn't define the battery management software for the phone so I don't know for sure. But this seems to be the common wisdom contained in the threads here. Good luck.
I have found that some kernels charge to 100 and then let it drain to 96% or so before recharging to 100%. They repeat this over and over until you unplug it, so when you unplug it, its the luck of the draw as to what percentage you are at. Some other kernels charge to 100 and keep it there until you unplug it.
There should be an article in the wiki, or at least a guide for the begginers. Lol at least I havn't bricked my phone yet.
I've had this same problem even with Calibration. Sometimes I get 100, sometimes I dont. With the external dock charger, it never tells me less than 100 though on my extra batteries, but my phone is luck of draw like said before.. I've calibrated twice, and I dont have the patience to do it anymore.
[Q] Wifi Tether: Subject to $15 T-Mobile Charge?
Curious about this. Currently I'm connected to my laptop for the past 15 min just fine; no alert came up that said I had to get the $15 fee that T-Mobile charges for the "privilege" of tethering on my current plan. Does that mean that an unlocked phone isn't subject to T-Mobile's tampering?
If so, is this the only value for rooting right now? I don't see any other need for root with this phone except if it fools T-Mobile.
Thanks in advance for your answers.
I know there are numerous threads about battery life, but this one isn't about the life itself really.
I can charge my phone to 100%, but when I unplug it, the battery indicator shows 97% right away. I plug it back in, rinse and repeat, and get the same issue. I even tried charging with the phone off.
Ha anyone had luck with using a full 100%?
allen099 said:
I know there are numerous threads about battery life, but this one isn't about the life itself really.
I can charge my phone to 100%, but when I unplug it, the battery indicator shows 97% right away. I plug it back in, rinse and repeat, and get the same issue. I even tried charging with the phone off.
Ha anyone had luck with using a full 100%?
Click to expand...
Click to collapse
This is normal, search some threads
slowz3r said:
This is normal, search some threads
Click to expand...
Click to collapse
I see that some people don't get to 100% during the actual charge process, but haven't seen my issue yet. I'll keep looking. So many of these threads...thanks.
Just trying to figure out whether it's worth going back for another phone or battery. What would you do?
Id keep it, there was an article posted in one of the threads stating why phones do this...the N1 did a similar thing where after it charged going from 100-96 percent went really quickly
i would equate it when you buy a 16 gig SD card and it shows as 15.6 gigs
Same thing here... pretty sure it's happening to most people.
Read this: http://byrong.com/PowerTesting/
allen099 said:
I know there are numerous threads about battery life, but this one isn't about the life itself really.
I can charge my phone to 100%, but when I unplug it, the battery indicator shows 97% right away. I plug it back in, rinse and repeat, and get the same issue. I even tried charging with the phone off.
Ha anyone had luck with using a full 100%?
Click to expand...
Click to collapse
Mine did this until I calibrated the battery. Charged it to 100%, then drained it all the way. Charged it back up to 100%, and now not only does the battery last longer, but the percentage seems to go down in a more linear fashion.
Read on...
http://www.androidpolice.com/2010/1...bump-charging-and-inconsistent-battery-drain/
Sent from my GT-I9000 using XDA App
brianbrain said:
Mine did this until I calibrated the battery. Charged it to 100%, then drained it all the way. Charged it back up to 100%, and now not only does the battery last longer, but the percentage seems to go down in a more linear fashion.
Click to expand...
Click to collapse
Same here, I've done this two nights in a row, but no change.
Thank you for the links, guys. Pretty insightful actually. I've got it charging right now at 99%. As soon as it hits 100%, I'll take it off and see if it drops instantly. I'm guessing it shouldn't as it JUST hit 100%. But we shall see..
Thanks again!
Same issue here afetr the caliberation and all
I really wouldnt worry about it guys, not like magical unicorns are eating your percentages
Well...I mean, it's not something anybody is "worried" about, but it does suck because I use my phone heavily as I'm in the IT field ... so every percentage counts. After I just unplugged, it went to 99% which my N1 did as well. I'm fine with 99%, but 97% seemed a bit low.
Full charge oddity
When the phone has been switched off and charging the phone shows the fully charged icon on screen when charging appears to be done. Battery Indicator Pro displays only a 95% charge when the phone is switched on. The same happens when the phone is on and being usb charged. When 100% charge is shown and the usb cable is removed the charge is then shown as 95%. This does not happen on my other devices running 2.2. They will show 100% or 99%. A device design or 2.3 bug?
Read this whole post:
http://forum.xda-developers.com/showthread.php?t=871051
The epic 4g has this problem. I think its something with samsung. You have to unplug it, plug it back in, let it charge to full again and rinse repeat until its really at 100%
Then reset your battery stats in cwm
Sent from my SPH-D700 using XDA App
As noted in the stickied FAQ and further discussed in the link provided by nxt (Beat me to it!), this is by design folks.
unremarked said:
Q: I unplugged my phone, and my battery dropped from 100% to 95% immediately, or it won't/takes along time to charge past 99%, what gives?
This is by design. Your phone will slow down and eventually stop pulling charge at or slightly greater than ~95% regardless of what your battery indicator says. This is to extend the overall life of the battery, as constant 100% to 0% charge/discharge cycles will cause it to fail prematurely. If you're interested in really pushing it to 100%, you can use a technique that is called "bump charging" and is better detailed here: http://www.androidpolice.com/2010/12...battery-drain/
Click to expand...
Click to collapse
<- Link has more or less the same info as nxt's.
maybe we need multiple FAQ stickies in this board..
Weird battery reading
My Nexus S was at about 16% when I put it on the charger then I did a quick reboot and it said it was at 52%. I unplugged it, powered off, pulled the battery, then rebooted and it read 28%. Even that is hard to believe after less then 5 minutes of charging. Has this happened to anyone else?
Stock 2.3.1 unrooted
Sent from my Nexus S using XDA App
deyna said:
Has this happened to anyone else?
Click to expand...
Click to collapse
Yes, that has been reported by a number of people. It has happened to me as well when rebooting while charging. Nothing is wrong with your battery though, it just must be a battery stats bug.
Good to know. Thank you for the prompt reply
Sent from my Nexus S using XDA App
Well I decided to do the thing where you charge all the way, turn off, charge again and remove battery stats, my battery wouldn't go above 95% charge even overnight. I decided to drain all the way and then remove battery stats, now it goes to 97%, any ideas? not sure if its just reading wrong or what.
keep reading, there must be over 40 threads about this
It is not reading incorrectly, it's just being honest with you. Please use the search function.
th3drow said:
Well I decided to do the thing where you charge all the way, turn off, charge again and remove battery stats, my battery wouldn't go above 95% charge even overnight. I decided to drain all the way and then remove battery stats, now it goes to 97%, any ideas? not sure if its just reading wrong or what.
Click to expand...
Click to collapse
its only supposed to charge to 95-97%. its a feature to help preserve your battery. if you want to see 100%, youll need to bump charge it there or charge the rest of the way with your screen on.
simms22 said:
its only supposed to charge to 95-97%. its a feature to help preserve your battery. if you want to see 100%, youll need to bump charge it there or charge the rest of the way with your screen on.
Click to expand...
Click to collapse
What simms said, watching a couple YouTube videos or anything that uses the processor above light usage will make it charge to 100% but I don't know if that's good for your battery .
As for what I know, on Nexus S the maximum charge is 96%. If you get more charge, it can damage your battery. Most of custom ROMs already have this fixed (when it's 96% it would actually display 100%).
Oogway13 said:
As for what I know, on Nexus S the maximum charge is 96%. If you get more charge, it can damage your battery. Most of custom ROMs already have this fixed (when it's 96% it would actually display 100%).
Click to expand...
Click to collapse
This must be one of the changes for CM9 nightly for the 4G because for the first time yesterday I saw it showed 100% after taking it off the charger.
Oogway13 said:
As for what I know, on Nexus S the maximum charge is 96%. If you get more charge, it can damage your battery. Most of custom ROMs already have this fixed (when it's 96% it would actually display 100%).
Click to expand...
Click to collapse
bmwjnky said:
This must be one of the changes for CM9 nightly for the 4G because for the first time yesterday I saw it showed 100% after taking it off the charger.
Click to expand...
Click to collapse
yup, its only a cosmetic fix. its not a true 100%.
this is normal, the battery charge only 97%. 100% is only cosmetic.
So I thought this was a fluke the first time then I was just able to reproduce the issue again. Once the battery level reaches 20%, the tablet will either shut itself down using the built in shutdown command or will just simply power off as if it doesn't have any power left at all.
I've charged it thoroughly and have even drained the battery down to 1% in the past but this keeps happening now. Any ideas?
Stock ROM/Rooted/TWRP
Tony_YYZ said:
So I thought this was a fluke the first time then I was just able to reproduce the issue again. Once the battery level reaches 20%, the tablet will either shut itself down using the built in shutdown command or will just simply power off as if it doesn't have any power left at all.
I've charged it thoroughly and have even drained the battery down to 1% in the past but this keeps happening now. Any ideas?
Stock ROM/Rooted/TWRP
Click to expand...
Click to collapse
this hasn't happend on my nexus yet but something similar happened to my LG Nitro HD. I basically rooted it and tried some battery calibrating apps on the Play store. In custom recoveries there's also this option to wipe batter status which i think might fix it but i've never tried it.
The battery gauge can be quite inaccurate. From what I have seen, I think Asus cut some corners in calibrating it for the specific battery chemistry - which makes things even worse.
Tony_YYZ said:
will just simply power off as if it doesn't have any power left at all.
Click to expand...
Click to collapse
It's not as if, there is no power left. The battery gauge simply had a wrong estimate of the remaining charge and suddenly the battery voltage collapses (happens very quickly towards the end of the discharge curve) and the N7 shuts down.
Messing with the battery stats doesn't do anything useful.
If you do a full charge / discharge cycle that may help a little with battery gauge accuracy. The battery gauge does some recalibration when doing that.
After a forced shutdown, fully charge and make sure the tablet sits around fully charged for at least 1h (e.g. just plugging it in over night will do fine). Then do a full discharge cycle with the N7 not plugged in at any time (normal usage will do just fine).
Those battery calibration apps don't anything useful, beyond getting you to run a full charge / discharge cycle.
Never happened on my Nexus 7, which have been taken down to 14% more than 10 times in the last 2 month. If what are suggested above don't work then use this tool to restore stock then Warranty return it or return it to store if you still have time,
Wonder if this is what happened to me last night. Was watching a video and it just shut off like the battery was dead. I wasn't paying attention to the battery but was almost positive it wasn't anywhere near zero yet. Never had the low battery pop up on me either. Hopefully it was a fluke...
there are many battery calibration issues/posts in old N7 forums. it also happened to me once in first couple weeks. what helped, I think, was shutting down the device completely with a little bit of battery left and just keep it unplugged for a few hours. Some say to preventively repeat this exercise every now and then..
Sent from my HTC One using Tapatalk
tni.andro said:
The battery gauge can be quite inaccurate. From what I have seen, I think Asus cut some corners in calibrating it for the specific battery chemistry - which makes things even worse.
It's not as if, there is no power left. The battery gauge simply had a wrong estimate of the remaining charge and suddenly the battery voltage collapses (happens very quickly towards the end of the discharge curve) and the N7 shuts down.
Messing with the battery stats doesn't do anything useful.
If you do a full charge / discharge cycle that may help a little with battery gauge accuracy. The battery gauge does some recalibration when doing that.
After a forced shutdown, fully charge and make sure the tablet sits around fully charged for at least 1h (e.g. just plugging it in over night will do fine). Then do a full discharge cycle with the N7 not plugged in at any time (normal usage will do just fine).
Those battery calibration apps don't anything useful, beyond getting you to run a full charge / discharge cycle.
Click to expand...
Click to collapse
NovaSense said:
Never happened on my Nexus 7, which have been taken down to 14% more than 10 times in the last 2 month. If what are suggested above don't work then use this tool to restore stock then Warranty return it or return it to store if you still have time,
Click to expand...
Click to collapse
Kohawk09 said:
Wonder if this is what happened to me last night. Was watching a video and it just shut off like the battery was dead. I wasn't paying attention to the battery but was almost positive it wasn't anywhere near zero yet. Never had the low battery pop up on me either. Hopefully it was a fluke...
Click to expand...
Click to collapse
millicent said:
there are many battery calibration issues/posts in old N7 forums. it also happened to me once in first couple weeks. what helped, I think, was shutting down the device completely with a little bit of battery left and just keep it unplugged for a few hours. Some say to preventively repeat this exercise every now and then..
Sent from my HTC One using Tapatalk
Click to expand...
Click to collapse
I had tried completely discharging it and then leaving it to charge overnight a handful of times without any luck. I ended up just restoring it to factory state and getting a replacement via Google Play Warranty Support. The new unit works just fine. It's an 07/2013 build unit just like the first one if anyone was interested.
by any chance do you use a qi wireless charger?
I have encountered a weird bug where if I charge my nexus 7 with a qi charger to 100% and leave it on the charger itll screw up the percentage/battery stats. with my situation, itll lock my battery % to 100% and wont go down until i go into twrp. If i just go into twrp and not recalibrate the battery stats, the percentage would be off and my nexus wont show the right %, so my nexus would shut off at random % instead of the normal 1% or 0.
millicent said:
there are many battery calibration issues/posts in old N7 forums. it also happened to me once in first couple weeks. what helped, I think, was shutting down the device completely with a little bit of battery left and just keep it unplugged for a few hours. Some say to preventively repeat this exercise every now and then..
Sent from my HTC One using Tapatalk
Click to expand...
Click to collapse
I can confirm this!
Did help on many devices for me with battery calibration erros...
Last one was a Galaxy S2 last weekend - turned of immediately, showed 0% upon start.
Took battery out for 4 hours, put it back in then and voila... 92% and everythings fine again.
junkinmytrunk426 said:
by any chance do you use a qi wireless charger?
I have encountered a weird bug where if I charge my nexus 7 with a qi charger to 100% and leave it on the charger itll screw up the percentage/battery stats. with my situation, itll lock my battery % to 100% and wont go down until i go into twrp. If i just go into twrp and not recalibrate the battery stats, the percentage would be off and my nexus wont show the right %, so my nexus would shut off at random % instead of the normal 1% or 0.
Click to expand...
Click to collapse
No, I do not have a QI charger. I was always using a USB wall charger.
Peace be upon you Brothers
For the past couple of days, I've been facing this weird charging issue with my Moto G5 Plus. When I plug the charger in - the phone says it's charging, but the battery percentage remains the same for hours. After 2-3 hours of charging this way, if I unplug the charger and replug it, within a couple of seconds the battery capacity suddenly shoots up to 100%. I have the original Motorola charger, a Nokia/Microsoft charger, and a battery pack that I've tried with same results. Any advice?
faheem.twoface said:
Peace be upon you Brothers
For the past couple of days, I've been facing this weird charging issue with my Moto G5 Plus. When I plug the charger in - the phone says it's charging, but the battery percentage remains the same for hours. After 2-3 hours of charging this way, if I unplug the charger and replug it, within a couple of seconds the battery capacity suddenly shoots up to 100%. I have the original Motorola charger, a Nokia/Microsoft charger, and a battery pack that I've tried with same results. Any advice?
Click to expand...
Click to collapse
I don't have much to offer, but is it rooted? If it is, you can try a battery calibration app to try to recalibrate the battery, although I doubt that would help. It seems like it's charging fine but the system isn't registering the battery life until you unplug the phone and it forces the system to check the battery life (in case it's at 0-1% and has to shut down.)
In any case, if it's rooted, it's worth a try.
Drkmatr1984 said:
I don't have much to offer, but is it rooted? If it is, you can try a battery calibration app to try to recalibrate the battery, although I doubt that would help. It seems like it's charging fine but the system isn't registering the battery life until you unplug the phone and it forces the system to check the battery life (in case it's at 0-1% and has to shut down.)
In any case, if it's rooted, it's worth a try.
Click to expand...
Click to collapse
Battery calibration is a fake.
Maybe your battery is dead... it happens...
nicolap8 said:
Battery calibration is a fake.
Maybe your battery is dead... it happens...
Click to expand...
Click to collapse
Oh hey, you're right! I just remembered it was something people recommended back in the day with custom roms and thought I'd suggest it.
Drkmatr1984 said:
I don't have much to offer, but is it rooted? If it is, you can try a battery calibration app to try to recalibrate the battery, although I doubt that would help. It seems like it's charging fine but the system isn't registering the battery life until you unplug the phone and it forces the system to check the battery life (in case it's at 0-1% and has to shut down.)
In any case, if it's rooted, it's worth a try.
Click to expand...
Click to collapse
Thankyou for replying...
The issue came 4 days back when the phone was still running stock rom oreo. I thought the problem came due to the latest security update. But i rooted and install custom romed my phone yesterday and the problem still persists.
faheem.twoface said:
Thankyou for replying...
The issue came 4 days back when the phone was still running stock rom oreo. I thought the problem came due to the latest security update. But i rooted and install custom romed my phone yesterday and the problem still persists.
Click to expand...
Click to collapse
Change charger. If the problem persists change battery.
faheem.twoface said:
Thankyou for replying...
The issue came 4 days back when the phone was still running stock rom oreo. I thought the problem came due to the latest security update. But i rooted and install custom romed my phone yesterday and the problem still persists.
Click to expand...
Click to collapse
How long the battery will give you life if you charge it for 2 to 3 hours???
riyan65 said:
How long the battery will give you life if you charge it for 2 to 3 hours???
Click to expand...
Click to collapse
Now i am calibrating the battery in hope if it resolves charging issue. I connect the switched off phone when it shuts itself down at 0 % to the charger, it shoots upto 70 % sometimes 60, other times it shows 80 %. The number gradually decreases to 2 % during the charging. After 2 to 3 hours when i switch on the phone it shows a charged battery upto 70 to 80 %. And give me a wonderfully remarkable stand by time as i assumed that the custom ROM. It discharges normally. I cannot understand the nature of it cause i like to use my phone when it is 100 % charged and use it untill it reaches 15 %.
faheem.twoface said:
Now i am calibrating the battery in hope if it resolves charging issue. I connect the switched off phone when it shuts itself down at 0 % to the charger, it shoots upto 70 % sometimes 60, other times it shows 80 %. The number gradually decreases to 2 % during the charging. After 2 to 3 hours when i switch on the phone it shows a charged battery upto 70 to 80 %. And give me a wonderfully remarkable stand by time as i assumed that the custom ROM. It discharges normally. I cannot understand the nature of it cause i like to use my phone when it is 100 % charged and use it untill it reaches 15 %.
Click to expand...
Click to collapse
It seems the battery is good and, it just need the battery calibration.as it is giving a long life. But you should not fully charge the battery as lithium ion battery is capable of full charge,so you should charge it upto 80%-90%.