I'm using MCR 2.9 and as I'm in between residences at the moment the Wifi Tether has been a life saver. However, it drains my battery ridiculously fast. Without AC power it will drain my phone from 100% to zero in less than 30 minutes.
Even with AC power, I can use the Wifi Tether constantly, but if i use it for say 3-4 hours, sometimes when I unplug the AC the phone dies instantly because the battery has been completely drained regardless of the AC power. It seems like the Wifi Tether app is draining the battery faster than the AC can charge it.
At one point I did briefly see a dialog saying something about the 'charge capability', but I accidentally OK'd it before I read it all and haven't been able to fire it again.
Does anyone else experience this problem or has seen the dialog i'm talking about?
Ok I found extensive discussion of the issue here: http://code.google.com/p/android-wifi-tether/issues/detail?id=8
For once I should've told myself to www.justfuckinggoogleit.com
Agree, but it should last longer than 30 minutes. About good 3 hours.
Suggestion:-- Upgrade to latest v1.70.
i use anetshare for tethering. the app drains the battery fast (though not 30mins-fast), but my biggest problem is that when i turn it off and do NOT restart my phone the battery is drained in about 3 hours, so the app is still running the wifi access point in the background... but maybe give it a shot.
Seems most of us have not noticed:
GB stops the charger supply on our SGS as soon as the battery is fully charged and then your phone uses BATTERY instead of charger to keep itself on!
If your phone has some apps running which drains the battery fast, your phone will drain the entire battery and will shut down when the battery is dead!
This is very dangerous for the battery to discharge every day because of this bug and Samsung and most of still haven't seems to notice this!
I have tested this several times now and downgrading the Froyo fixes the issue.
This issue occurs even when the phone is sitting idle with minimal battery drain for several hours connected with charger (in such situation the drain is minimal with few percentage like when you disconnect the charger.
Let me know if some of you have different experience as my phone definitely has this issue which doesn't exist if I downgrade to Froyo.
We all can check this behavior:
Charge the phone till it says 100% charged. Use the phone normally or heavily for several minutes (like web browsing). Keep it connected to charger while it says "Charged" 100% for a couple of hours (to ensure that you did not drain the battery beyond charger capacity). You would still get much lesser than 100% charge after removing the charger (try using battery indicator tools which tells exact %age of battery).
This bug exist on all the Gingerbread images I have tried including official and those based on JVP 2.3.4
Read below how lithium ion batteries work best if used around full charge (without over charging - Phone and Battery has protection circuit) during regular use:
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
Thanks to "$omator"
Use this software to test your battery: https://market.android.com/details?id=ccc71.bmw
Deeper than 10% charging and discharging cycles unnecessarily will significantly reduce the lifetime of the battery. Hence when phone is plugged, it should charge battery to 100% and power the phone through charger after stopping charging. Samsung usually stop charging around 96% of full capacity of battery to avoid over charging. After disconnecting the batteries once around 96% was achieved, it will restart the charging cycle around 95%. Hence all builds till Froyo reported close to 100% charge level and never less than 95% when disconnected from the charger.
GIST - Batteries should maintain floating charge voltage to avoid depletion and wear unnecessarily while connected to the charger after full charge and phone should run on Charger ONLY. Instead, Samsung goofed up Gingerbread drivers to switch off the charger and run the phone on batteries randomly draining the battery sometimes completely. GB OS thinks phone is running on charger and hence show 100% charge and RAPIDLY drains the battery till it goes dead when batteries go dead (randomly)!
Last screenshot is from Froyo. Attaching more on a later post on how stable it is in Froyo.
EDIT 1st July - More screenshots on how Froyo maintains stable voltage and do not consume battery power (current) in post #57: http://forum.xda-developers.com/showpost.php?p=15228263&postcount=57
Screenshot #5 and #6 tells the DROP in battery voltage as soon as the charger is connected (200mV!) which speaks how much the GB OS consumes more when plugged in and STILL discharging!
Got the same problem with jpu. i didnt really realize this problem until this morning, just wondered why i had only about 90% battery in the morning after charging while with froyo i had about >95 in the morning.
today i slept until 10:00 and wow, battery was at 70(!) %.
when i plugged it in yesterday, ive got about 80% left (well, charging the phone every night seems to be a rite for me).
(and yes, im always listening to the sound when plugging the charger in).
so, as far as i can say, phone does not just stop charging at 100%, it also seems to consume much more power than it should. dangerous for battery, when the phone keeps plugged in for t >> t(100%).
This is a known issue of all current gingerbread builds. It will probably be fixed in due time.
and we wait for it
and we wait for it
Glad to hear it's a common issue. I was wondering if my batt/charger was faulty
Anyway, let's hope this gets fixed soon!
I noticed this the other day, hope it is fixed soon!
Yes, this has bugged me for the last month or more. Hence my question here about downgrading to 2.2.1...
http://forum.xda-developers.com/showthread.php?t=1135297
A temporary workaround - turn the phone off. Plug the charger in, then power on. Doing it this way should keep the battery topped-up after it first hits 100% charge - at least it does for me(I think reliably, but I can't remember). But it's a nuisance - especially as I tether for my home internet these days. Machines updating the OS overnight have seen me unplug to have less than 60% charge despite it saying 100% before unplugging, which doesn't last the day.
Unimpressed with Gingerbread on the whole. And Samsung/Kies for not letting me downgrade if the latest update(s) aren't up to much.
Actually I'm running eclair today to compare the battery. Got sick of unplugging it in the morning only to have less than 70% charge.
Sent from my GT-I9000 using Tapatalk
I don't appear to have this problem, I put my phone on charge last night at 23:30 as usual, the alarm went off at 07:30, then played a couple of tunes, phone showed 100%. Disconnected charger, went downstairs, checked xda for any news, saw this thread, checked my phone's battery level and it showed 98% after being disconnected from charger for 27 mins. Unless I'm using nav or maps my normal battery drain is 4% per hour in a reasonable signal strength area, so 98% after 30mins is normal for me.
For ref: Galaxy i9000, XEU UK unbranded on XXJVO via keis. no mods.
Thanks for posting this I used my phone's gps yesterday when driving and I only just stumbled across this when I got where I was going, phone still said battery at 100% whilst plugged in but as soon as I turned the engine off and killed the charger my phone died with a dead battery.
Somewhat annoying to say the least, I'm going back to a 2.2.1 Rom tonight I've had loads of problems with all the 2.3 Rom's I've tried mainly lag and battery drain. I never seem to have any free RAM on gingerbread, lucky to get 50Mb on boot
oh well rant over the world can now continue ;-)
goughymachine said:
Actually I'm running eclair today to compare the battery. Got sick of unplugging it in the morning only to have less than 70% charge.
Sent from my GT-I9000 using Tapatalk
Click to expand...
Click to collapse
Well, woke up this morning and unplugged phone. 1.5 hours later and it's on 95% still, with a little usage. Didn't see that on 2.3.4. Using jg4 fully stock, only rooted. I might stick jsd on it today and see how it goes tomorrow. Not many apps back on it though. Surprisingly the phone feels quite fast at the moment. Don't remember eclair being like this. Not seeing much difference between 2.3.4 and it currently.
As I use go launcher, having gingerbread is probably less important for me cause I kind of don't use many of the features of it (the launchers etc) anyway.
Geryatrix said:
I don't appear to have this problem, I put my phone on charge last night at 23:30 as usual, the alarm went off at 07:30, then played a couple of tunes, phone showed 100%. Disconnected charger, went downstairs, checked xda for any news, saw this thread, checked my phone's battery level and it showed 98% after being disconnected from charger for 27 mins. Unless I'm using nav or maps my normal battery drain is 4% per hour in a reasonable signal strength area, so 98% after 30mins is normal for me.
For ref: Galaxy i9000, XEU UK unbranded on XXJVO via keis. no mods.
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Click to collapse
I would appreciate if you could test the issue by using the phone heavily after full charge by KEEPING THE CHARGER CONNECTED AFTER FULL CHARGE (preferably playing 3D games or running benchmarks) and disconnect the charger to check the battery level.
Seems most of us are unaware of this issue and some confuse this with the excess battery drain issue after DISCONNECTING the charger.
Thank goodness I found this thread. I had thought there was something wrong with my battery. After unplugging my battery would instantly drop from 100% to 96%, once even 87%. Thinking it was something to do with battery re calibration due to me flashing new roms, i wiped batt stats many times and went through of arduous process of draining and fully charging, but to no avail. Now I will rest easy despite still facing this bug. At least I know I'm not the only one.
yep...i just flashed a couple of days ago from stock 2.2 (KC1) via kies to 2.3.4 (JVP) using ODIN. I have had it charge fully and upon removal of the usb cable, it dropped from 100% to 98%. Since then, I have gone through one full discharge and the subsequent recharge to 100% dropped to 96% upon charger removal. I recall reading about this somewhere suggesting a recalibration was needed, but I was just trying to get it up to 100% and didn't have the time to search forums (i was using a portable usb charger). I disconnected the charger and after reconnection and display of 100%, it would then drop to 97% instead of 96%. A repeat proved fruitless and so I tried to charge it while off. Turning it on after a bit I found that it was brought up to 98%. Repeated process for 99% and FINALLY 100%. Though the final 100% was achieved after a few 100% while off and while on charges. It stayed at 100% for a bit over 30 mins. I will see how subsequent charges behave...
mwshuo said:
Thank goodness I found this thread. I had thought there was something wrong with my battery. After unplugging my battery would instantly drop from 100% to 96%, once even 87%. Thinking it was something to do with battery re calibration due to me flashing new roms, i wiped batt stats many times and went through of arduous process of draining and fully charging, but to no avail. Now I will rest easy despite still facing this bug. At least I know I'm not the only one.
Click to expand...
Click to collapse
This is a serious bug as it will significantly reduce the battery life due to repeated deeper charge and discharge cycle.
unless i've misunderstood, it seems to me that what will really affect battery life is the battery stats calibration. where it once would charge to 100%, it will now charge to, for example, 96%. Doing a calibration will make that 96% appear to the phone as 100%. From reading, it seems calibration is required for firmware flashes, so the more flashes and calibrations you do, the less battery life you will have since subsequent calibrations are done when the battery reading is less than 100 immediately after an unplug. Following the example above, the next flash could also have the same issue of displaying 100% and then 96% immediately after an unplug. The user would try to calibrate their battery yet again. Now this time, the 96% is of the previous full reading (which was actually 96% but appears as 100% b/c of calibration). So, the after a second calibration, the 100% reading is actually closer to 92.16% of the original pre-flash and pre-calibrated battery (96% of 96% of 100%).
hope that makes sense and someone can confirm, or instead (which i hope), prove me wrong as I would hate to think that what I stated is true since that will GREATLY diminish battery life artificially.
such overcharging (power off + connect charger and so on) is slowly killing battery
and it is not a bug that phone dsiconnects charger when it hits 100% and starts eating batt
anyways read my signature yellow part
$omator said:
such overcharging (power off + connect charger and so on) is slowly killing battery
and it is not a bug that phone dsiconnects charger when it hits 100% and starts eating batt
anyways read my signature yellow part
Click to expand...
Click to collapse
Yeah, but in pre-gingerbread roms the charging started again when below certain value, so it stayed above 90% all the time.
Now you can drain the battery heavily by using it while plugged (and the battery always shows 100%), then unplug and have it jump down to like 60%, or worse, turn off.
The only way to restart the charging is removing and connecting the charger again.
i tkink thyve must decided that such upcharging when almost full shortens battery life
mk_ln said:
yep...i just flashed a couple of days ago from stock 2.2 (KC1) via kies to 2.3.4 (JVP) using ODIN. I have had it charge fully and upon removal of the usb cable, it dropped from 100% to 98%. Since then, I have gone through one full discharge and the subsequent recharge to 100% dropped to 96% upon charger removal. I recall reading about this somewhere suggesting a recalibration was needed, but I was just trying to get it up to 100% and didn't have the time to search forums (i was using a portable usb charger). I disconnected the charger and after reconnection and display of 100%, it would then drop to 97% instead of 96%. A repeat proved fruitless and so I tried to charge it while off. Turning it on after a bit I found that it was brought up to 98%. Repeated process for 99% and FINALLY 100%. Though the final 100% was achieved after a few 100% while off and while on charges. It stayed at 100% for a bit over 30 mins. I will see how subsequent charges behave...
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Click to collapse
You are confusing recalibration and battery drain after full charge
The issue is after full charge, phone disconnects the charger and start draining batteries till it goes dead.
Let me rephrase the issue - batteries start draining immediately after full charge as the phone somehow start using battery INSTEAD of charger ONLY after full charge!
This is a serious bug as the GB drivers switch off the charger (instead of batteries) after full charge when the OPPOSITE has to happen!
i phone is acting weird lately. i'm running tried , AOKP, Voltage revolution, and now running rootbox rom they all seem to have this problem of slow charging time on my phone. The worse part is the phone can never seem to charge to 100% even i leave it charging overnight. And after it reaches to 100% the battery drains quickly by itself. Every time when i reboot the phone 2 % of battery disappears. Is this happening to everyone? or just me?
godlyitem said:
i phone is acting weird lately. i'm running tried , AOKP, Voltage revolution, and now running rootbox rom they all seem to have this problem of slow charging time on my phone. The worse part is the phone can never seem to charge to 100% even i leave it charging overnight. And after it reaches to 100% the battery drains quickly by itself. Every time when i reboot the phone 2 % of battery disappears. Is this happening to everyone? or just me?
Click to expand...
Click to collapse
Try doing a full charge cycle (discharge completely to 0%, then recharge, without stopping, to 100%). This recalibrates the battery.
Hi!
I'm suffering from a strange battery behavior lately: This morning, after 9 hours charging, I woke up to a 75% full battery, when usually, it should get 100% charge overnight. Previously, I had an accidental power off by power depletion, some hours ago.
Now, I'm trying to charge the phone but it seems to charge way too slow.
Finally, I decided to power it off and let it charge without any possible drainage. In the moment I powered it off, I was prompted with the battery icon displaying 96% charged...??!?!?!?
I don't know if either the battery is broken, the rom is reporting it wrong or what.
I usually play Ingress, which drains the battery like crazy, and I'm usually browsing the internet and reading twitter on my phone, so, at the beginning I thought I just needed to keep my hands off the phone for a while and let it charge, but after that overnigt 75% charge incident... I don't know what to think.
ROM is Carbon ROM KK, kernel is AK without any tweaks, no undervolting or anything... any advice?
GFXi0N said:
Hi!
I'm suffering from a strange battery behavior lately: This morning, after 9 hours charging, I woke up to a 75% full battery, when usually, it should get 100% charge overnight. Previously, I had an accidental power off by power depletion, some hours ago.
Now, I'm trying to charge the phone but it seems to charge way too slow.
Finally, I decided to power it off and let it charge without any possible drainage. In the moment I powered it off, I was prompted with the battery icon displaying 96% charged...??!?!?!?
I don't know if either the battery is broken, the rom is reporting it wrong or what.
I usually play Ingress, which drains the battery like crazy, and I'm usually browsing the internet and reading twitter on my phone, so, at the beginning I thought I just needed to keep my hands off the phone for a while and let it charge, but after that overnigt 75% charge incident... I don't know what to think.
ROM is Carbon ROM KK, kernel is AK without any tweaks, no undervolting or anything... any advice?
Click to expand...
Click to collapse
Don't over charge.
Yes, I have the bad habit of being unable to see my phone drop the battery level under 60%. At my job, I always leave it on a qi charger, regardless of it being full or empty. Perhaps I have to take the habit of letting it drain until 30% or so, and start charging then.
Other thing I can do is limit the charge level top, tweaking the kernel setting via synapse..... Could that be a good thing?
After starting the phone, the battery level seems to be OK. It's 87% now and it's draining quite slow, compared to before. I guess I'll have to start treating my battery better.
Sent from my Nexus 4 using Tapatalk
Some update: the phone was bought on March 2013,but the battery has a build date of December 2013. I think the guys that repaired the phone swapped the battery for another one and left me with a defective one.
Hello,
Im having so much problem from my nexus4 phone .
Phone gets turned off suddenly even when I charge it full and then i need to connect to charger and turn it on then battery will be 50percent low from 95percent.
Also when ever phone battery is low my network drops completely. And then reconnects to netowk and then again disconnects continues until I plug in.
It lasts hardly few hours.
I did spin test and battery is also fine.
I also formatted,installed official ROM but nothing helps .
I used battery stats and all to find if any app is spoiling it. But no apps are spoiling my battery.
Please help
Thank you.
Although the spin test was fine, I do believe that this is still a battery issue. I would recommend purchasing a new OEM battery and installing that, and then flashing a completely stock ROM using fastboot, then testing.
Just be careful when you take it apart. My N4 battery was behaving really badly, not holding a charge for very long, shutting down even though the indicator said 30% remaining, etc.
Pulled off the (freshly cracked) back cover, and I had a case of FBS (fat battery syndrome). Seems as though the thing was on its last legs. You should definitely take some time to research the relevant safety precautions you should take (I should have looked this up, but didn't).
I ended up removing it and replacing it with an OEM battery I ordered from Amazon, the percentage calibration still isn't the most accurate, however it holds a significantly better charge now.
Are we both having the same issue?
http://forum.xda-developers.com/nexus-4/help/nexus-4-off-unplugged-charger-t3132425