[Q] Problem with Battery life randomly dropping 30%? - AT&T Samsung Galaxy S II SGH-I777

So I know this has to be a software problem, and not a hardware problem, but I have no idea how to narrow it down. This issue has traversed 2 separate devices 4 separate batteries, and multiple Roms from Stock to Stock based (haven't tried CM7 don't feel it is ready for what I need out of it). It's not always easy to reproduce but it is bothersome.
Pretty much, randomly my device will have trouble connecting to the web, (sometimes it just freezes) I can't figure out why it is, so I do a power cycle, When I do the power Cycle I have about 40-50% left. When I turn my phone back on, I'm down to 12-20%. There is no reason for that kind of discrepancy. I've drained out the battery when it does happen, charge it back up, and the problem doesn't show again for a couple days. Randomly it does happen again, since I have a whole new device and a trusted new battery I figured since it happened to ask around.
Interestingly enough, if I pull out the battery (at least this time) the device gained 4%. Also over time the percentage does slowly rise if I leave it alone, but not faster than I would be able to drain it. I am attaching screenshots so you can see what I am talking about, alas I don't have before screenshots.
Also I know my battery life isn't the best out there, but I don't really think of myself as an overly heavy user, I usually kill batteries in my devices after about 2-3 hours of screen on time which leads me to think part of the lower battery life I have is due to the signal in my neck of the woods.
Apparently XDA is not letting me upload any photos to it so I have to use an imgur link in order to allow the screenshots to be shared. Apologies and I will try again when I get home to get them up.
http://imgur.com/a/M8QjJ

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Same thing has happened to me, on 3-4 different occasions...shut down and restart the phone for a random reason, then when I turn it back on, I have about half the battery % remaining as I had before shutting it off. Exact the same as you're describing, will have it slowly rise a few % points after its been back on awhile. Thought it was my device, but maybe not?

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dgold21 said:
Same thing has happened to me, on 3-4 different occasions...shut down and restart the phone for a random reason, then when I turn it back on, I have about half the battery % remaining as I had before shutting it off. Exact the same as you're describing, will have it slowly rise a few % points after its been back on awhile. Thought it was my device, but maybe not?
Click to expand...
Click to collapse
Since it happened to me on two separate devices and different batteries and roms it's gotta be something else in the unit I just have no idea what it is. Could be a problem with the Stock Firmware and battery meter. Yes I am running custom roms but they are stock based.
Sent from my SAMSUNG-SGH-I777 using xda premium

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our fuel gauge glitches sometimes - it happens.
Happened with the MAX17040 in the Infuse too.
The numbers after a battery pull should be the most accurate - especially if you let it sit for a while during the pull.

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Entropy512 said:
our fuel gauge glitches sometimes - it happens.
Happened with the MAX17040 in the Infuse too.
The numbers after a battery pull should be the most accurate - especially if you let it sit for a while during the pull.
Click to expand...
Click to collapse
Pulling gets me 4% back. Still never would have expected a 30% drop. That really means with my barely using my device my battery life is sub par. (on 2 separate devices nonetheless with different batteries) 9 hours with a bit over 2 hour screen on time till dead? I'd say it's software but I have really nothing running in the background, I did notice this device is nearly always running at 1200 Mhz when the screen is on, but I can't find any reason for that or application that would cause it since my first device didn't have that issue with the same Apps.
For Reference I am adding in my BBS. I am at work all day hence WiFi on since I notice I have better battery life when WiFi is on with all of my other devices
Code:
===================
General Information
===================
BetterBatteryStats version: 1.1.1.0
Creation Date: 2011-11-02 18:22:40
Statistic Type: (0) Since Charged
Since 9 h 19 m 59 s
VERSION.RELEASE: 2.3.4
BRAND: samsung
DEVICE: SGH-I777
MANUFACTURER: samsung
MODEL: SAMSUNG-SGH-I777
===========
Other Usage
===========
Wifi On (): 7 h 32 m 21 s (27141 s) Ratio: 80.8%
Bluetooth On (): 3 h 51 m 17 s (13877 s) Ratio: 41.3%
Awake (): 3 h 48 m 26 s (13706 s) Ratio: 40.8%
Screen On (): 2 h 16 m 16 s (8176 s) Ratio: 24.3%
Phone On (): 28 m 27 s (1707 s) Ratio: 5.1%
=========
Wakelocks
=========
android.media.MediaPlayer (com.google.android.music.Music): 26 m 24 s (1584 s) Count:1223 4.7%
KikNetwork (kik.android.Kik Messenger): 12 m 42 s (762 s) Count:154 2.3%
*sync* (com.google.android.gm.Gmail): 8 m 14 s (494 s) Count:134 1.5%
AlarmManager (Android System): 6 m 36 s (396 s) Count:5770 1.2%
show keyguard (Android System): 6 m 22 s (382 s) Count:139 1.1%
ActivityManager-Launch (Android System): 4 m 36 s (276 s) Count:1027 0.8%
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*sync* (Google Services): 2 m 12 s (132 s) Count:56 0.4%
*network-location* (Android System): 2 m 1 s (121 s) Count:1111 0.4%
GmailProviderProviderChangedBroadcastWakeLock (com.google.android.gm.Gmail): 1 m 58 s (118 s) Count:211 0.4%
GSM (Dialer): 1 m 44 s (104 s) Count:55 0.3%
sleep_broadcast (Android System): 1 m 40 s (100 s) Count:1988 0.3%
RILJ (Dialer): 1 m 33 s (93 s) Count:3731 0.3%
FacebookService (com.facebook.katana.Facebook): 1 m 22 s (82 s) Count:26 0.2%
SMSDispatcher (Dialer): 1 m 10 s (70 s) Count:37 0.2%
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*network-location* (com.google.android.googlequicksearchbox.Google Search): 37 s (37 s) Count:25 0.1%
GpsLocationProvider (Android System): 33 s (33 s) Count:1233 0.1%
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DownloadManager (Media): 28 s (28 s) Count:13 0.1%
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Proximity Partial (Android System): 11 s (11 s) Count:158 0.0%
GOOGLE_C2DM (Google Services): 9 s (9 s) Count:1415 0.0%
*sync* (com.cooliris.media.Gallery): 7 s (7 s) Count:2 0.0%
Checkin Service (Google Services): 7 s (7 s) Count:2658 0.0%
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*backup* (Android System): 5 s (5 s) Count:2070 0.0%
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NfcService (com.android.nfc3.Nfc Service): 5 s (5 s) Count:203 0.0%
*network-location* (com.sec.android.app.camera.Camera): 4 s (4 s) Count:2 0.0%
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*sync* (com.google.android.apps.docs.Docs): 3 s (3 s) Count:2 0.0%
PhoneApp (Dialer): 3 s (3 s) Count:62 0.0%
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com.google.android.music.MusicPlaybackService$AsyncMediaPlayer (com.google.android.music.Music): 2 s (2 s) Count:1203 0.0%
DocsSyncAdapter (com.google.android.apps.docs.Docs): 2 s (2 s) Count:3 0.0%
PreventScreenOn Partial (Android System): 2 s (2 s) Count:1117 0.0%
*network-location* (com.bumptech.bumpga.Bump): 2 s (2 s) Count:1 0.0%
*sync* (com.google.android.music.Music): 2 s (2 s) Count:1241 0.0%
*network-location* (com.joelapenna.foursquared.Foursquare): 2 s (2 s) Count:32 0.0%
*sync* (com.google.android.apps.books.Books): 1 s (1 s) Count:1 0.0%
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C2DM_LIB (com.joelapenna.foursquared.Foursquare): 1 s (1 s) Count:22 0.0%
LocationManagerService (Android System): 1 s (1 s) Count:234 0.0%
=========
Processes
=========
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events/0 (0): Sys: 3 m 13 s (193 s) Us: (0 s) Starts: 0
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mmcqd (0): Sys: 25 s (25 s) Us: (0 s) Starts: 0
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========
Services
========
Active since: The time when the service was first made active, either by someone starting or binding to it.
Last activity: The time when there was last activity in the service (either explicit requests to start it or clients binding to it)
See http://developer.android.com/reference/android/app/ActivityManager.RunningServiceInfo.html
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I used to get this on the Captivate, and I've had it once or twice on the SGS2, but it's never been a problem. make sure you do a full discharge (or at least down to 15%) once in a while. I try to do it every 2-4 weeks.

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Dungeon47 said:
I used to get this on the Captivate, and I've had it once or twice on the SGS2, but it's never been a problem. make sure you do a full discharge (or at least down to 15%) once in a while. I try to do it every 2-4 weeks.
Click to expand...
Click to collapse
Yea, I bought a external battery charger, I'm keeping 3 charged batteries at all times with how I apparently kill my batteries, and empty them to turning off and charge them back up.

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I can confirm this has happened to me. It has happened a couple times when flashing a ROM or theme. The battery would go from 46% to 16%.

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My phone once went from 56% to 0% (dead) overnight. Another time it went from 30% to 0% (dead) overnight.
Usually it drops 1-3% overnight, but on those two occasions, it obviously dropped WAY more.
No idea why.

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chrikenn said:
My phone once went from 56% to 0% (dead) overnight. Another time it went from 30% to 0% (dead) overnight.
Usually it drops 1-3% overnight, but on those two occasions, it obviously dropped WAY more.
No idea why.
Click to expand...
Click to collapse
I would happily take that 1-3% I lost 15 to 20 overnight with the device in deep sleep supposedly most of the night.
Sent from my SAMSUNG-SGH-I777 using xda premium

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If you want to save the battery life during night, better first step is to use "Sweet Dreams", download it from market and enable it after setting sleep time and wakeup time under general tab, this apps somewhat helps though not great extend, give it a try, this may help the phone from going dead.