yashsingh1/xdaforums huggingface dataset:
[Galaxy S I9000 General] Heritz:
After reading the following post here in XDA, I think what Samsung did with this ROM makes kinda sense:

http://xdaforums.com/showthread.php?t=1168036

So, if that's true, we need to avoid leaving the battery fully charged. So, Samsung probably made the software stop charging the battery at 100%, and then switch to battery in order to start discharging it ASAP. Maybe it wasn't intentional, maybe it was.
[Galaxy S I9000 General] $omator:
Your theory does not make sense

After discharge it recharges and stay full

It would discharge again ifyour theory woul be true
[Galaxy S I9000 General] belmethos:
LOL :D

PS: I use a charger and plenty of batteries, so i have never noticed this bug.

But this is important if u plug it in your car and having a trip for 10 hours, listening music via bluetooth , navigation at the same time etc....

This needs to be solved, do not let this thread die..........
[Galaxy S I9000 General] $omator:
yup the discharge will most likley hit you at the time when you will try to disconnect the charger after good sleep :)
[Galaxy S I9000 General] maya_jorge:
Not only samsung GB, HTC too...

Hello. Issue seems due to GB, not only to a Samsung device. I have a HTC Merge and yesterday installed the new GB leaked rom, and it appear today´s morning on 30% of charge after stay all night connected in wall charger. Previous USC stock rom rans battery flawless.
[Galaxy S I9000 General] $omator:
when youll have time check with battery widget if it will come back to max battery capacity after that
[Galaxy S I9000 General] kaynpayn:
This feels weird. Every single phone and just about every battery using device i ever had / seen does not exibit this behaviour - they stay charged after reaching 100%. They all more or less use the same kind of batteries and i don't see samsung's lasting any longer than any other.

That would mean the whole world is wrong and only android on it's gingerbread flavour got it right? :)

'cos.. usually, when you're right and the world thinks/behaves otherwise, turns out you weren't :P

I still think this is a gingerbread bug, and a serious one at that. Should've been addressed already.

btw i downgraded back to froyo (JS8 w/ darkcore 1.4) for gps testing purposes and never got this bug again - battery charging behaves properly staying charged to 100% (dropping to 99% at best) after removing plug, matters not how long has been plugged or what usb mode is being used.
[Galaxy S I9000 General] $omator:
'drain' when charged to 100% and still conected - still present from first test...

needs more cycles to determine better

fron jvs - unrooted - needs more testing :)
[Galaxy S I9000 General] fredbull:
Oh ! :(

I was thinking so much this JVS could solve this bug :mad:
[Galaxy S I9000 General] $omator:
also phone fc is still there - i am disapointed in this 2.3.5 release
[Galaxy S I9000 General] Prankey:
It was very much random most of the times for me and that's why atleast once in a week I used to get DEAD battery without any specific pattern.

Oh GOD, yet another REASONING???? Please dude, understand that this is NOTHING BUT a BUG! I did all these reasoning and investigation BEFORE OPENING THIS THREAD.

Going through the thread you referred - I thank you for pointing to it, however it discusses the same stuff we have been discussing here that significant drain and recharge, overheating are the biggest battery killers! And this BUG does precisely that by draining the battery and recharging it hence increasing the temperature threshold as compared to fully charged and sort of disconnected battery.

Also, GB OS restrict the charge level to be slightly less than 4.2V and momentarily drops the voltage once in a while in spikes to keep the battery chemistry working fine. Hence the heating and corrosion issues are taken care of this way as I see the full charge voltage few mV lesser than what it was on Froyo and hence the temperature after full charge also stays 1 to 2 degrees lesser (at times when GB is luckily maintaining full charge).

I still can't believe Samsung has not yet released a fix.
[Galaxy S I9000 General] Prankey:
NO this is NOT a generic GB ROM issue as I confirmed it after switching to SGS2! I continue running the battery monitor widget after switching to the new phone and ABSOLUTELY NEVER HAD THIS ISSUE ON ANY BUILD of SGS2 ROMS!

This is NOT a GB issue dude, this is a Samsung GB ROMs specific bug on SGS1 and hence switching to Froyo or Eclair would immediately fix it.
[Galaxy S I9000 General] caribbean_spur:
All,

I am what you guys call a newbie in the matter of android. I bought a I9000T a few months ago, on both Eclair and Froyo (stock) everything was running smoothly, battery was great (2-3 days with light to heavy usage).

Upgraded to GB (stock) and everything went down the drain. Battery life was terrible and yes, I had the problem of waking up in the morning with a half drained battery. Well long story short, phone started random shutdown and all so I just returned it and got a new one. I am still on Froyo with again great battery. I am not willing to upgrade because all the issues I had. But I just wanted to chime in. I definitely believeit is a bug on this phone none of the crap about how it is made on purpose to protect the battery. All my friends upgraded and they do not that this problem (different phones)
[Galaxy S I9000 General] ccrows:
This is why I've gone back to Froyo. Battery life IMO is better on Froyo, even though Froyo is not as fast as GB...
[Galaxy S I9000 General] Nash123:
I switched from Froyo to JVS. I guess I go back too.

It's a shame. Bug exists since several months and Samsung does nothing about it ...

---------- Post added at 03:48 PM ---------- Previous post was at 03:16 PM ----------

Yes, the fast depletion when connected is very very strange.
[Galaxy S I9000 General] Prankey:
Yes its almost like the connected charger sort of short circuit the battery to drain it faster! When this happens, if you disconnect the charger, you will immediately gain mV as highlighted earlier. And as soon as you connect the charger, there is a momentary drop of mV. Sometimes this difference is more than 100mV!
[Galaxy S I9000 General] emil_b:
Hi!

On my SGS with Froyo this never happened. When I charge the phone over night on the next morning I have the 100% battery and there is no battery drain. I don't think is a hardware bug. I believe there is a software incompatibility. Recently I've found that when the charger is connected the phone never sleep. So, to processor will run constantly. Measuring the charging current, even after the battery is full I've got over 100 mA. So, probably on GB when the battery is full the phone use the battery instead of charger...You could make this test, to see after battery fully charged what is the current drown from charger. I do not know to much about flashing of the phone and I don't want to change actual firmware that works very well, on my opinion. I've read to many complains about GB roms and I still wait for a good one.

I hope this helps.
[Galaxy S I9000 General] Tarlabgab:
This issue has been noticed for several months. May be they gonna wait for ICS update next month.:D

BTW any one on CM7 has this issue??
[Galaxy S I9000 General] zroice:
Didnt read all 11 pages, but the real questions are (imo):

Does the phone gets recharged when it starts to get discharged after beeing charged fully. Like: You charge it full, the charger turns off and the battery is used, then after the phone loses a few % or smth the charger reactivates itself.

This would mean that there is a constant charging/discharging cycle, which probably is not so healthy for the battery indeed.

Second question would be if the phone actually ever runs off the charger and not only appears to - have you tried starting the phone without a battery inserted? Right - you cannot turn it on then, means to me that the phone always uses the battery as power source?! On Laptops etc you can just pull out the battery and start it without, on the phone you can't - there must be a reason for this.

So it could be that Froyo just "fakes" to use the charger to power the phone by constantly recharging the battery as soon as it loses energy.

Just speculating here.

I will test my phone/rom to see if it suffers from the same problems as described in the open post.
[Galaxy S I9000 General] emil_b:
As I wrote on previous post my experience is:

When the battery is full charged the phone still use about 100mA from charger, with screen off. The voltage on battery stays at 4.2xx V. When the charger is removed the battery voltage drops. So, it look like there is no load on battery while charger connected.

This happened with mi I9000 with Froyo 2.2, and I thing it is normal, as I am using PDAs as from Windows Pocket PC 2002 till windows mobile 6. All of them had this behaviour. Also, another thing, with the charger connected and screen on the current consumption increase. And increase if I start the Wi-fi, and so on...

Only problem is that because the processor does not enter sleep while charger connected the current consumption do not decrease to a very low value, to see how much power use the phone while sleeping.
[Galaxy S I9000 General] Prankey:
I know the phone needs battery to start, however once the battery is charged to full, it just maintains the voltage and takes power mostly from the charger. T

Take an example of a tube well. Farm needs water supplied by an intermediate tank which inturn gets water from the tube well. Once the tank is full, it will have a float valve to reduce or shut the flow as per the drain at the tank. The more the drain, the more the well will supply water to the tank.

Hence, when the tank is full, its not really utilizing the water within by instead is practically transferring what it is getting from the well.

Now what happens on a GB ROM on SGS is it will randomly stop charging and let the "tank" to drain to a random level (sometimes letting it go empty and out of supply - dead condition!). Its like the float valve is malfunctioning and randomly stopping the supply completely when it has to provide supply to maintain the "water" level. As the valve is defective, it may resume water supply any time randomly when the float drops from its "stuck" position to release more water to the tank. Due to which the flow of water increases significantly to fill the tank and everytime the valve somehow resumes supply. Now this supply is also intermittent and variable in nature (you might not get full flow even when the tank is getting empty but it will help it sustain water for more time).

This is the situation on all the GB builds from Feb '11 onwards. So there is no pattern on how and when this happens, it just happens randomly and when you are heavily using the phone and the battery, you are most affected by this phenomenon as you will more frequently have rebooted phone to charging mode, almost nil battery, frequent charge discharge cycle, etc!
[Galaxy S I9000 General] firestorm76:
I have this problem with deodexed rom. But every since I loaded the original odexed rom, I don't see this problem anymore. I didn't do anything special. Just flash and use. Didn't clear battery stats or anything.

Tried 2 GB odexed roms and I don't see this issue. The roms are DXJV9 and XXJVR.

I haven't tried the new 2.3.5 JVS yet.

---------- Post added at 02:21 AM ---------- Previous post was at 02:08 AM ----------

The only extra thing I did was flashed another kernel to root the rom and then flashed the original kernel back.
[Galaxy S I9000 General] Chrono_Tata:
I switched to CM7 nightlies to test this and I can confirm that this issue isn't present. After a week of use and leaving the phone plugged in after a full charge I always get 100% when I unplug. Data from juice plotter confirms it.
[Galaxy S I9000 General] duffmannr3:
I have never had this issue on stock JVO. BUT since I updated "gentle alarm" to the current version (few days ago) I am also experiencing this problem. Every morning when I unplug Battery goes directly from 100% to <80%. Really annoying.
[Galaxy S I9000 General] Prankey:
For me the issue existed on OFFICIAL ODEXED, UNROOTED ORIGINAL ROMs as well. Could be that JV9 and JVR might have fixed on the odexed version. Can someone confirm?
[Galaxy S I9000 General] IbrahimNassef:
Hello Guys;

I had the same problem you were talking about, Keep the phone in the charge then sleep for 7 or 8 hours and wake up disconnecting it, usually it drops down from 100% to 90% or even 85%, If I used the phone it may drop to 70%, and all I've done is set the USB Setting to "Samsung Kies", and tested it via Battery Monitor Widget, and I think it fixed it, slept from 3:30AM woke up at 10:15AM Local, nearly 6:30 hours of sleeping.. and Battery was 99% when disconnected + I've used the phone while charging, Screenshots attached..
[Galaxy S I9000 General] bhu1:
well deodexed roms seems to have messed up battery stats a lot

http://xdaforums.com/showthread.php?t=1283316

Read my thread's second post and if your problem is same then try calibration. And hit thankx if I helped. :-)

hit thankxx if i helped. sent from my mind through telepathy (ya its possible)!
[Galaxy S I9000 General] bhu1:
One thing I have noticed is that in samsung's stock gingerbread( also samsung based gingerbread roms) samsung has added a new feature where the phone automatically stops charging when charged to maximum (100%) and connected to charging, this feature is not in cm7 and stock froyo . Thats why when you disconnect your charger it instantly drains to 90 or something else as what you said, what happens is it chargers to 100% then stops charging because of the feature although connected to charger and then shows exact battery after what have drained that is in this Case 90% as you said. Then it keeps draining until you re -connect the charger.

I think samsung should make changes to this feature so that after it drains to 98% from 100% and still connected on charging then it should automatically re start charging. If you agree then hit thanks.

hit thankxx if i helped. sent from my mind through telepathy (ya its possible)!
[Galaxy S I9000 General] bhu1:
Cyanogen mod 7 does not have this issue it keeps charging after it has reached 100% . But samsung's roms stop charging after 100% and freeze.

hit thankxx if i helped. sent from my mind through telepathy (ya its possible)!
[Galaxy S I9000 General] IbrahimNassef:
Hello;

That's what we are talking about, there is a major problem in Samsung's GB ROMs, that after reaching 100% of charging, the phone starts to disconnect the charger and works on battery, while GB thinks that it's still charging and keeps the 100%, it all appears when disconnecting the charger, but I've replied on that because I think it's kinda fixed with me once changed the USB setting to "Samsung Kies" instead of "Mass Storage"..

Thanks..
[Galaxy S I9000 General] bhu1:
Sorry didn't read the whole thread, just read tour last post.

hit thankxx if i helped. sent from my mind through telepathy (ya its possible)!
[Galaxy S I9000 General] bhu1:
***Edited to null***
[Galaxy S I9000 General] Nabbolo:
Never had this problem, but with Android 2.3.5 battery life has improved more than before!
[Galaxy S I9000 General] Nash123:
Hopefully it is fixed in JVT. Please report if you experience anything related to the topic ;)
[Galaxy S I9000 General] Nash123:
After testing it one day, I can confirm the bug is still there. F... Y.. Samsung!
[Galaxy S I9000 General] spamtrash:
1. ramad's deodexed image jvt (btw - thanks again, man, it is brilliant)

2. WiFi set to sleep if screen off (if it matters)

flashed yesterday, with battery at 70%. titanium Backup, etc, Market, etc... ended with 56%.

Put into charger.

This morning, after 7 hours of charging - 98% on battery.

I would NOT call it: bug..:rolleyes:

In fact, I did not observed such with jvr as well...
[Galaxy S I9000 General] Nash123:
Well, I tested it now several times. It ALWAYS drains battery as all GB-Roms before.

@spamtrash: Are you using custon kernel? I have CF-Root. But with stock it behaves the same.
[Galaxy S I9000 General] Prankey:
That might be because you don't use the phone while charging. So even if you are affected (ALL ARE AFFECTED INCLUDING YOU AND THAT IS A FACT!), you wouldn't notice it as the drain is minimal if it happens.

Well... suit yourself. UNLESS YOU USE IT HEAVILY, even if you disconnect from charger after full charge in the night, that would be the drain!
[Galaxy S I9000 General] spamtrash:
What do you mean: heavily? To observe, I made yesterday shortened test: 85% charged, went to car, put car charger and started Navigon. WiFi on, GPS on and locked, navi operating. Battery full after hour or hour+20 minutes.

Car charger off -> battery dropped to 95% and after that was gradually discharging (rather quick, as the Navigon is blocking screen always on).

But: while disconnecting the charger, I did not observed dramatical drop to 80, 70 or something.

I'll be happy if you will propose heavier test...
[Galaxy S I9000 General] Nash123:
You have to use it heavily AFTER it reaches 100%. Charger attached. The longer the time between reaching 100% and removing the charger the higher the discharge.

But even if you don't use it at all it consumes more power with the charger attached, than without. As stated several posts from different people before. The sgs2 does not behave this way, nor did froyo. So I'd call it BUG.
[Galaxy S I9000 General] ErsdaHL:
is this happenin with cm7 and miui too?
[Galaxy S I9000 General] spamtrash:
Aaaa, now I got you: I have to drive several minutes, until sgs will be fully charged, and THEN switch the navi on? Brilliant idea, and very practic....:rolleyes:

But OK, I will try your way nearest time, give me3 hours or so for check.
[Galaxy S I9000 General] Prankey:
Again, if it was charged, should not drop 5% after disconnecting! Also, as emphasized this is a very RANDOM behavior of the ROM and hence it wont necessarily affect you every day unless you used the phone like me (Wifi Tethering always on).

Fellow members using those builds confirm its not affected. Only Samsung sourced 2.3.x ROMs (all till date) are affected!
[Galaxy S I9000 General] gsw5700:
I'm using JVT, I leave the phone on all night charging, when I wake up, the phone is always at 100% Shouldn't the charging stop when it reaches 100% to stop damage to the battery? It never did this on JVR

Sent using TCP/IP
[Galaxy S I9000 General] Dan_Aykroyd:
So does JVT fixes this? :O

In my JVS, the only way for it to not discharge if left plugged in charging over night is to do it with the laptop in standby. For some reason, when doing that, 100% of the times it works fine and the phone is still at ~97% after unplug.

If I do it with the laptop on, never minding the Kies, USB, Debug, etc. USB modes, the charge would drop quickly after it fully charges.

You might want to try that to see if that works for you too.

In any case... is there any reliable fix for this?

Thanks
[Galaxy S I9000 General] Peacemanibk:
I had this bug in JVP for a long time, but it disappeared several weeks ago. I know that i have played with the usb-settings and the usb debugging, but i am not sure what i have done exactly. The bug is not gone completley but its now fair enough for me and i dont want to play with the settings again ... ( it charges up to 100% - discharges to ~70% charges again and then stays at nearly 100% until disconnect - so i have always full charge in the morning)

I have usb kies mode and usb debugging disabled, JVP (goa rom).
[Galaxy S I9000 General] keulieminogue:
I would like to know, if this issue happens to odexed and deodexed roms.

I use tweaky rom v2 odexed for a few days now and i think its (almost) gone. Have to test a bit more but ist ok now...
[Galaxy S I9000 General] PatcheZ:
Didn't seem to have this bug before, but since jumping to jvs and jvt, this bug of driving me nuts

I can't ever tell if the phone is actually charged or not
[Galaxy S I9000 General] tiddydiddler:
I finally flashed my phone, and dropped back to 2.2.1. It's great to wake up to a full battery charge each morning. I really am disgusted that six months on - half a year - Samsung still don't think this is important.

Their lack of care, response, or fix, is very worrying. Their Gingerbread builds take great hardware, and render it unreliable with no path to return the software to its original or last state - without using leaked tools and ROMs, and voiding your warranty if caught.

I'm using the May XWJSD build, and the NEJV5 modem file from 3UK's Gingerbread release. Signal reception is great, GPS locks quickly, battery always charges properly and lasts - depending on use - between 1 and 3 days. Oh, and the web browser scrolls properly... ;)

And I didn't realise how much I missed "Daily Briefing" when I was on Gingerbread!
[Galaxy S I9000 General] Prankey:
If you go through the thread, except for CM based ROMs, all official/leaked GB ROMs from Samsung is affected by this bug. Chances are very high that you never noticed it before but it always existed on every GB ROM you used other than CM7.
[Galaxy S I9000 General] keulieminogue:
Ey guys. Most of the custom roms cm7 and miui also are deodexed. I use an odexed rom and the drain issue for me is gone! And... batterylife is great.
[Galaxy S I9000 General] $omator:
nothin changed in JVT ...
[Galaxy S I9000 General] Dan_Aykroyd:
Indeed. Odexed JVT and the same thing happens. :mad:

Is so annoying... to have to be fully dependent of when the phone charges completely and then run to unplug it because if not, it will draiiiiiin! :(
[Galaxy S I9000 General] Prankey:
You seems to be another one of those who do not READ through the thread before posting!

We are NOT discussing normal battery drain here. We are discussing RANDOM DRAIN while ON CHARGER! Hope you could understand this time. Is an issue with all odexed and deodexed ROMs (not related).

CM7 based ROMs do not have this issue before because they come from an independent source and not from Samsung! All Samsung GB ROMs (odexed or not) are affected. PERIOD.
[Galaxy S I9000 General] keulieminogue:
I read carfully and I ment that drain issue while the phone is "charching" sorry... with JVS tweaky rom installed i dont have that issue
[Galaxy S I9000 General] $omator:
lolz ... no comment
[Galaxy S I9000 General] LiverpoolFCfan:
Today I found by accident an interesting wrinkle for this thread.

I had plugged in my phone to my computer to prepare for a ROM update. I normally charge fully before flashing to avoid all the battery calibration hassle.

Anyway, after the ROM had downloaded, I looked at the status of the phone to see that it was 96% charged. In my impatience, I thought - maybe if I pop it on the wall charger for a few minutes it will charge to 100% quicker.

What do you know - 5 seconds after connecting it to the wall charger it popped up the 100% charged - remove charger message.

I looked at the phone status, and indeed it said 100%.

I pulled the charger, and it immediately dropped to 96% again.

I reconnected the phone to the USB cable, and re-checked the phone status again, and it shows Charging(USB) and 96%

So, perhaps there is something happening related to the charger/charging source that contributes to this issue. It might help explain why some people see it and others don't as chargers are a commodity item whereas the phone internals are more tightly controlled.
[Galaxy S I9000 General] Nash123:
Your description is the normal behaviour since - well - ever. Don't know what your point is. Maybe I just don't get it.
[Galaxy S I9000 General] geyes:
Yes, this seems random on GB as I found sometime phone is good after whole night charging, sometime it will change charge % once I unplug in the morning. but the drain is not much around 5-15%.:confused:
[Galaxy S I9000 General] rmean:
Hey people,

If you know how to do it, try to change your cpu governor to "conservative" while it is asleep.

Aside of the fact the phone runs on battery after fully charged, i think the cpu scales up to 400mhz while plugged in, leading to battery drain. The conservative governor should not scale that high and thus stop the drain.

i will try it tomorrow night, maybe someone else would like to participate ;)

Regards