yashsingh1/xdaforums huggingface dataset:
[Galaxy S I9000 General] Prankey:
As indicated in my first post, Froyo and virtually all the devices disconnect the battery after full charge. Hence the device runs colder than when it is using battery like in GB. As my application is to use the device after full charge, Froyo runs MUCH COLDER than GB as in GB after full charge, battery starts getting RAPIDLY drained after full charge hence running it hotter.

Also, one very interesting fact in GB - Battery voltage DROPS by 0.1 to 0.2 Volts after connecting USB/Charger! That tells why the battery drains so rapidly after full charge. I tested on USB today (yesterday I somehow got full charged on USB after several hours), however today, after full charge, in 4 hours of minimal use basically USB tether and temperature not crossing 41 to 43 degree Celsius, it got reduced to 27%!

Use this widget for yourself to monitoring how battery behaves (and is gradually destroyed) in GB:

https://market.android.com/details?id=personal.jhjeong.app.batterylite

I will test this pattern in Froyo and report accordingly.
[Galaxy S I9000 General] $omator:
use proper software to test your battery -> https://market.android.com/details?id=ccc71.bmw

i think you will draw very interesting conclusions after analyzing proper data
[Galaxy S I9000 General] Prankey:
Thanks, AWESOME, that is what I was looking for! Let me know your findings as well.
[Galaxy S I9000 General] $omator:
well ive flashed that latest 2.3.4 - JVQ - will see now what happens after full charge

i think that case is closed =) it is recharging / fixed
[Galaxy S I9000 General] goughymachine:
I charge my phone overnight and don't have great cell reception. On eclair my cell reception would show as much as 40% of battery use and sometimes higher than my display use; and could have as much as 20% of my time without reception.

On jvp when I unplugged in the morning my battery would often show as little as 70% of battery left. Back on eclair and now froyo and it's between 100% and 96%. It only really bugged me when I'd have days away from home and with no charger available.

So I might give jvq a go for a few days and see what happens!
[Galaxy S I9000 General] $omator:
dont root it try on stock i will do the same today - leave on charger attached
[Galaxy S I9000 General] mrbrush:
I've got the exact same problem. The problem is that when the phone is connected to a charger or USB, it won't go to sleep (CPU in low power stand-by state), which means that it will drain the battery much faster than it would without being on the charger in the first place. Normally, when in ("deep") sleep, the CPU is not even running.

You know when the CPU is in standby/sleep mode, if the display is off and you press the power button, the lock screen appears only after a short delay, about 1 second, whereas, if the phone is not sleeping, it appears right away.

I am on JVP currently, and the same issue was present on JVO, JVH too. I will test JVQ soon.
[Galaxy S I9000 General] goughymachine:
I'll give it a go tonight. Will be tough on me to not root it so I can reinstall with ti.
[Galaxy S I9000 General] $omator:
i think the battery must be properly calibrated prior to this test

there are some wierd things going on after unpluging the "chatge from usb"
[Galaxy S I9000 General] Wastl0r:
Maybe it shows this weird behavior because your capacity is set to low.

You can switch it to 1500mAh somewhere in the preferences.
[Galaxy S I9000 General] $omator:
well while "charged by usb" connected it is using battery =) ~4h = ~40%

time to recharge by ac charger and leave it connected this way
[Galaxy S I9000 General] goughymachine:
Interesting. I didn't know that. Battery monitor widget says my battery has 1200ma.

Don't suppose someone could point me in the right direction to change this?
[Galaxy S I9000 General] tiddydiddler:
My battery gets flat, I stick it on charge around 8pm when I get home. Powered up, enabled tethering, left it on charge overnight. Battery gets fully charged after ~3 hours - 4196mv. I carry on using the internet, send a couple of texts, etc, leave it plugged into the charger and go to bed. Come the morning, it still reads 100% - but the battery is on 3750mv.

It doesn't keep the battery topped up - not all the time. Sometimes it does. I could understand the phone deactivating the charging cycle when it hits the design capacity, then switching it back on once it drops below 4150mv or so. But it doesn't do that.

This is a huge, glaring bug, and shame on Samsung for letting it go through(even when their first update was allegedly "yanked" bu Google)!

If the phone is powered off, charger connected, then the phone powered up, it seems more likely to keep topping up the battery overnight. When the charger is just plugged in, it seems more likely to hit 100% and then stop charging completely.
[Galaxy S I9000 General] $omator:
yup i was wrong it is discharging battery after reaching 100%
[Galaxy S I9000 General] Wastl0r:
Can confirm that for JVQ.

I woke up this morning, looked on my screen and my battery showed 100% with charger plugged.

When I unplugged battery went straight down to 88% ...

Is it really such a problem for the Samsung devs to repair that???

Sent from my GT-I9000
[Galaxy S I9000 General] deady2k:
Car Navigation is unusable since 2.3.3. for me.

Yesterday i used it 5 hours, phone was nearly full. I plugged it in my car power adapter and after a while phone was at 100%. 4 hours later phone powers down and went into this little charging "OS". It was completely discharged.

Can someone confirm this?

cheers
[Galaxy S I9000 General] goughymachine:
Probably just the bug. Once it hit 100% it switched back to using battery even though still plugged in. hence it drained.
[Galaxy S I9000 General] $omator:
considering you will use sgs1 as a gps car navigation, that is gps+display+data connection for some+cpu/gpu usage(?) those are the so called "battery drainers" you will get your battery zeroed in few hours - unless ofc discharging by nav usage and charging will balance =]
[Galaxy S I9000 General] Prankey:
Back after 2 days of extensive research. Used Battery Monitor widget you suggested (can't thank you enough for that) and have got some initial study on how Froyo and GB behave differently. Pasting the screenshots on the first post.

BTW, rooting, switching kernels do not really change the experience. Issue is the same, GB maintains the charge for few minutes (absolutely RANDOM in nature) than discharges the phone till it goes to about 3690mV and BOOST charge from there increasing the temperature to upto 51 degrees! Repeats the cycle randomly. I didn't have dead battery during 1 day of testing, however such cycles continued till I switched to Froyo where it consistently kept the battery charged most of the time (especially during idle time with 3G and WiFi tether enabled).

Froyo maintains the equilibrium and stops battery charging or discharging with 0mA current during consistent load cycles (uses charger instead to power the phone as indicated). So its proved thru this test that Froyo works as expect, charge the battery to full and maintain the floating charge level while using the charger to power the phone (unless it needs some surge power where it may use the battery for few seconds (usually a second or 2) before equalizing the charge again to around 4200mV.

Since Froyo maintains charge all the time, the uneven current drain and temperature is also minimized and there is an increase in nominal temperature by a degree or 2, however it never shots like GB to 51 degrees as it never has to do that "boost" charge cycle after the battery almost goes dead!

So while using GB, its essentially using the battery charge and discharge cycles several times during the day, unnecessarily stressing it during BOTH charge and discharge cycles. Also, both charge and discharge cycles are VERY SHARP as it seems battery drains very fast while plugged in.

EDIT: Please find the STABLE Voltage and Current consumption of battery despite HUGE difference in operating temperature based on load at those times. Last screenshot shows that the idle temperature despite maintaining full charge with wifi connected is around 30 degrees.
[Galaxy S I9000 General] $omator:
so basicly it will not let the battery discharge to 0% but 3690mV seems to be close to that ... very good finding, hopefully samsung is reading xda and your topic will not dispaear at all this spam around =)
[Galaxy S I9000 General] goughymachine:
Tend to agree with this. My phone was plugged in from about 20% power for 5 hours tonight. Unplugged when I woke up with it saying 100% and immediately it dropped to 71%. So it's been on plugged in but using the battery for maybe 3 hours of that time and lost 10% an hour while idle. I know during the day and unplugged while idle it loses a bit, but nothing even close to that.
[Galaxy S I9000 General] goughymachine:
Pranky, if you don't mind me asking. I see you battery says it's 1500ma in the screen shots. I have the g7 battery which says 1500ma on the battery itself, but in battery monitor widget it says it's only 1200ma.

Anybody know what's going on with that, or is my battery wearing out or something?
[Galaxy S I9000 General] Prankey:
I ALWAYS configure an app before using it :) You need to go to menu (left touch key on the phone) >> Monitoring >> Battery Capacity to set the value. Its a cosmetic thing which is relative to the charge percentage and is the the actual reading of current battery capacity.
[Galaxy S I9000 General] mk_ln:
you actually have to manually edit the battery capacity in the options of the widget :)
[Galaxy S I9000 General] tiddydiddler:
Figured I'd grab a couple of screenshots to illustrate the problem. 8 seconds between captures.

For what it's worth, my battery reads 4192-4196mv when fully charged(properly charged and then removed from a power source for 30-60 seconds, not a false reading) and 3388-3421mv is classed as empty enough to make it power down.
[Galaxy S I9000 General] mrbrush:
As I said earlier in this thread (see here http://xdaforums.com/showpost.php?p=15174303&postcount=45), the battery is draining faster when plugged (!!!) than when unplugged, because the OS thinks that the phone is on an external power source and won't let the CPU go to sleep mode. That is why you loose 10% for every plugged-in hour after reaching 100%.

Huge problem, all GB ROMs from the first leaked one are affected by this. That means that the problem is there from March/April!!
[Galaxy S I9000 General] Prankey:
Yes, precisely all the GB ROMs I have tried till the first leak has this issue.

EDIT - And that speaks of the 200mV DROP when charger connected. If you look at the #5 and #6 screen shots on the first post, battery voltage drop from 4192mV to 3992mV as soon as I connect the charger because the OS immediately tune to power consumption mode appropriate to plugged and unplugged. This difference is not that huge when USB connected as OS knows it can not drain upto 700mA current as charger when USB connected (must be tuning to upto 500mA). So its PROVED that all the GB builds are BATTERY KILLERS without doubt straining battery BOTH during discharging after full charge and BOOST charging when the battery is almost dead! Both these conditions are VERY DANGEROUS for the battery and the phone as it results in the temperature shooting as well as UNNECESSARY strain on the battery.
[Galaxy S I9000 General] Prankey:
Its not that easy. Like we see spiked drops randomly especially on GB ROMs, it can randomly power off during this low TRIGGER VOLTAGE if there is a negative spike happening as GB OS consumes max power in this mode believing it is plugged in and taking power from the external source with battery charged at 100% :eek:
[Galaxy S I9000 General] goughymachine:
Just looks so bloody weird, seeing the battery lose 29% while plugged in, though the last 3 hours on battery (granted on a bike ride in better reception area) only lost 2%.

As I'm in the land of Aus, I find it hard to complain about the gb roms as it's not official for us. As much as it pains me, I can't complain about a 'leaked unofficial' rom. Still wish it worked. Gonna give js8 a blast today for the fun of it.
[Galaxy S I9000 General] Prankey:
Its like using the power 3 to 4 times more than what it would use without plugged it. Real battery killer and I can still see most of us not noticing it :)
[Galaxy S I9000 General] goughymachine:
Maybe many do notice it but it doesn't bother them, or they only leave there phone plugged in until charged. I connect mine every night and disconnect it in the morning, so I notice when I have 30% less battery straight away. I also don't have great cell reception where I am. When I went back onto eclair I noticed that at times my cell reception was using 40+% of my battery, often with 15 or 20% no reception. I'm assuming that that's taking up some juice with it trying to hold a signal.

When I tried eclair (jg4) and jsd the worst it ever showed once disconnected was 96%.
[Galaxy S I9000 General] Peacemanibk:
Has anybody with an official GB update already filed it to Samsung? Sinve i am runnimg on Custom Rom and theres no official update to GB in my country i have not done it myself. Would be goos that as many as possible hit Samsung so that they get aware of it - possibly correcting this for their (hopefully) release of 2.3.4 ...
[Galaxy S I9000 General] TRexxx:
Strange. I had every GB roms from the begining but i dint had the charger connected over night problem till now. The only different thing i have made with jvq was wiping all the caches. And of course a factory reset/default
[Galaxy S I9000 General] Prankey:
I have done that already and they are working on it. Flashed official DDJV6 India version today (again) with stock kernel and the battery went as low as 3452mV (around 10% charge) before recharging!
[Galaxy S I9000 General] Prankey:
As highlighted, you will notice it ONLY when the phone is USED after full charge. Like Tethering, gaming, GPS, 3G, Low Signal areas, etc. while connected to the charger to save battery.

Also, this nature is very random as we have observed so best is to use the battery monitor widget while testing it.

Like today I had only one drain cycle today till 3452mV before the phone recharged and is holding the charge (though also consuming battery more in spikes (so minor charging/discharging cycles) as compared to more stable floating charge on Froyo.

EDIT - Wipe/clean install do not help as you see I am switching to and fro between various 2.2.x and 2.3.x ROMS which is not possible without wiping. Have monitored on a factory clean OS as well without installing a SINGLE additional app. So its DEFINITELY an inherent GB bug which exist on every ROMs I have used (like you).
[Galaxy S I9000 General] TRexxx:
What i tried to say is that i jump from froyo to gb passing through jvh, jvp till jvq without any wipes or facory defaults... i have the same behaviour: i leaved the phone connected over night. till jvq, in every morning after i unpluged the charger the battery just dropped to 98-96%. this morning with jvq flashed last evening with wipw and factory reset/default after unplugged the charger battery voldage dropped to 76%...Nothing else...

Respect

PS. while connected i heavy used wifi and i used battery monitor too :)
[Galaxy S I9000 General] Prankey:
Probably your phone was sitting idle after full charge when you used before and hence the drain was not so much. Even a 4% drain when idle is too much as otherwise in Froyo it almost never drop below 98% (usually get 99 to 100% after disconnecting). If I don't use my phone much through the entire day, I hardly get about 10% depletion over 12 hours or so.

Main issue is when you use battery heavily after full charge, it start depleting after few minutes to couple of hours (again very random in nature without any trigger factor) and discharge rapidly till almost empty (sometimes abruptly switching off the phone). Also, when charger connected, Froyo maintains the voltage almost constantly while GB keeps getting negative spikes frequently, hence triggering more charge cycles than needed :(
[Galaxy S I9000 General] TRexxx:
I undersand. You are right. Also i wandered why there is no fix yet or why samsung didnt takes in consideration to repair this problem... It is very annoying
[Galaxy S I9000 General] goughymachine:
Probably because they are leaked unofficial roms. They don't have to fix them If they don't want to.
[Galaxy S I9000 General] johnybravojr:
Samsung thinks it can sell phones with good hardware configurations and not bother about or even acknowledge any bugs on their functioning, even on a software level.

We all know the infamous GPS bug in SGS, and how Samsung dealt with it. This is no different from that!

Hopefully some ROM cookers will look into it and save us from missing some important calls in case we left the phone to charge and drain overnight!
[Galaxy S I9000 General] $omator:
2.3.3 out of kies is also 'affected'
[Galaxy S I9000 General] spysot:
I missed battery life of 2.2.1 !!!
[Galaxy S I9000 General] $omator:
i would not say that battery life is same in 2.3.3 / 2.3.4 as was earlier

youve got much better performance from phone with basicly same battery life as far as i can tell in every day use (you dont need ext4 conversion + overclocking - if you want to use your sgs1 as a pda not as gaming rig =)
[Galaxy S I9000 General] pwhooftman:
I do not experience this...

I'm on XXJVQ with CF-Root kernel (flashed yesterday).

I have no drain-after-charged bug whatsoever. Look at this picture, my phone was on the charger all night, showing the alarm clock with the animated screensaver. That screensaver generates a constant 10% cpu load (see screenshot), so it should have been draining the battery if my phone would switch to battery after 100% charge. Instead it keeps full, battery was still 93% after 2 hours off the charger, currently 82% 10 hours off the charger....

On XXJVP. i would occasionally see a drop from 100% to 93-94% right after disconnect, but never below that.

btw, i formatted /data, /system and /cache before installing XXJVQ, and did a repartition also. And, before i took the phone off the charger this morning, i rebooted into recovery and wiped battery stats, because i have been flashing Roms & kernels a lot lately so my stats were way off (i even have seen the battery charge rise while unhooked from the charger :-) )

Uploaded with ImageShack.us
[Galaxy S I9000 General] Prankey:
I am currently on OFFICIAL DDJV6 since past 2 days on stock unrooted kernel.

More update - I have the phone plugged in 24x7 in the last 2 days. Within an hour had one discharge cycle which drained the battery almost completely.

After that it stayed full charge (charging cycle for a couple of hours) till another 30 hours. Then again the same cycle repeated till almost full drain. This issue is truly random in nature. Will keep the phone plugged for another 24 hour to see if there is a pattern.
[Galaxy S I9000 General] Prankey:
Keep monitoring for another couple of days and I am CERTAIN you would notice the bug as its very random in nature and at times it may maintain the charge.
[Galaxy S I9000 General] hackertc:
I have the same problem i just bought the phone

I thought it has the battery worn-out.

I will try tonight to charge my phone wile off.
[Galaxy S I9000 General] devilh:
I found a charder that works correctly

It is a usb charger(charger with usb connection instead of a long cable, that you can connect any usb cable you wish).

the manufacturer is motorola(i have it since my N97).

I noticed i have the problem described here (waking up to see 64% battery, 81%, and the amazing 6% which made me want to kill some one.

I have many chargers, so it took time to notice that the specific charger is the one that i should use at night.

Any way, the details:

Brand: Motorola

Model: DC4050EU0301 (could barely read it)

Pics:
[Galaxy S I9000 General] castaway1:
im encounter exactly same bug as you write in OP..waiting for fix. I need to have my prhone fully charged at morning.Not at 80-85% after night of charging..

crap :mad:
[Galaxy S I9000 General] habylab:
Froyo had much better battery regardless of this bug, I'd say. But this needs to be fixed. Can someone write up a post and email Samsung?
[Galaxy S I9000 General] goughymachine:
The only problem with complaining to samsung is if you are in a region that hasn't had some form of gb update. No one has had an official upgrade to 2.3.4 so you certainly can't complain about firmware your not spose to have yet. For me in australia, I either put up with it or do as I have and go back to jsd. Wake up with a full battery now.
[Galaxy S I9000 General] Prankey:
Charger should not matter as till Froyo we never had this issue.

I have already emailed a very STRONG email to Samsung and they are looking into it.

I switches to JVP and now it swings big time thru charge/discharge cycles. So official 2.3.3 was way better in this regards with only 1 discharge cycle in about 30hours.

Yesterday I disconnected the charger during a call battery was at 3677mV and it showed 8% after disconnecting! Got rebooted while talking and started giving low battery warning. Didn't monitor the voltage then by the level was like 2% only!

Could be a calibration issue, however its so frustrating that how a 100% charged battery becomes 2% within a minute you disconnect the charger.
[Galaxy S I9000 General] pwhooftman:
Three days have passed, still no bug for me.

This morning, i disconnected the charger and connected again in the car about 40 minutes later (i had 99% left). I waited till it was charged 100% (took just 1 minute for the notification to show up) and then fired up my navigation app Navigon. I navigated about 40 minutes, took the phone of the charger and it only dropped to around 95% (which is not uncommon, i have seen it happen many times. I believe it's actually a feature to keep the battery level floating between 95% and 100% because Lithium batteries wear faster when fully charged. In Froyo i tended to see a staggered battery level log in SystemPanelApp throughout the night). The screenshot shows the battery remained charged during navigation.

If navigation was running on battery, it should at least have dropped like 20% (based on my experience i can navigate around 3 hours on a full battery.

I flashed XXJVQ through Odin two times. The first time i noticed the /system partition had 0% free (despite coming from another Rom with a 512 pit file). So i formatted /data, /system and /cache and flashed again, this time with repartion ticked. Now, the free size in /system is around 2 Mb. Still not much, but at least no risk of any system app not fitting into /system when flashing.

Uploaded with ImageShack.us
[Galaxy S I9000 General] Prankey:
Thanks for the update.

Can you also monitor through the battery monitor widget? I haven't tried JVQ yet, however this issue seems to be more disturbing in JVP as per my last post. I am currently using JVQ compatible (or based, I don't know if JVQ source code is available) - Snail 09 (TalonDev based) kernel. Will try another kernel to see any improvement.
[Galaxy S I9000 General] tiddydiddler:
Your experience is very different to mine...

http://xdaforums.com/showthread.php?p=15235398#post15235398

Lowest I've had upon discharge so far is 36%. I don't care about attempts to increase long-term battery life if my phone is regularly requiring a recharge by the afternoon - which happens more than once per week since the official 2.3.3 "upgrade"...

It's broken. Occasionally it works as it should...