[Xperia Arc Q&A, Help & Troubleshooting] qscccc:
last night before i slept, i just made a long phone call. then i turned off the 3g and wifi and went sleep.

but when i wake up today , i find that my cellphone battery drained. so i used betterbatterystats to see whats going on.

it was a process called *backup* from android system drained the battery.

it was not the first time this happen…

i used stock ics rom, unrooted.

here is my betterbatterystats

=================== General Information ===================

BetterBatteryStats version: 1.9.2.1

Creation Date: 2012-08-23 08:37:31

Statistic Type: (0)

Since Charged Since 5 h 34 m 6 s

VERSION.RELEASE: 4.0.4

BRAND: SEMC

DEVICE: LT18i

MANUFACTURER: Sony Ericsson

MODEL: LT18i

OS.VERSION: 2.6.32.9-perf

BOOTLOADER: unknown

HARDWARE: semc

FINGERPRINT: SEMC/LT18i_1254-2184/LT18i:4.0.4/4.1.B.0.431/UL5_3w:user/release-keys ID: 4.1.B.0.431 TAGS: release-keys

USER: BuildUser

PRODUCT: LT18i_1254-2184

RADIO: 8x55A-AAABQOAZM-203028G-72

Rooted: false

============ Battery Info ============

Level lost [%]: 94 Voltage lost [mV]: 357

=========== Other Usage ===========

Awake (): 5 h 34 m 6 s (20046 s) Ratio: 100.0%

No Data Connection (): 4 h 12 m 20 s (15140 s) Ratio: 75.5%

No or Unknown Signal (): 4 h 12 m 20 s (15140 s) Ratio: 75.5%

Phone On (): 1 h 40 m 25 s (6025 s) Ratio: 30.1%

Good Signal (): 49 m 8 s (2948 s) Ratio: 14.7% Screen On (): 19 m 45 s (1185 s) Ratio: 5.9%

Poor Signal (): 5 s (5 s) Ratio: 0.0%

========= Wakelocks =========

*backup* (Android System): 5 h 28 m 41 s (19721 s) Count:340 98.4%

AudioOut_1 (1013): 1 m 21 s (81 s) Count:34 0.4%

AlarmManager (Android System): 55 s (55 s) Count:8752 0.3%

talkOperationWakeLock (jp.naver.line.android.LINE): 29 s (29 s) Count:8490 0.1%

EnumerateFilesService (com.mobisystems.office.OfficeSuite): 23 s (23 s) Count:1 0.1%

ActivityManager-Launch (Android System): 21 s (21 s) Count:199 0.1%

NotificationService (Android System): 20 s (20 s) Count:351 0.1%

SyncService (com.evernote.world.Evernote): 17 s (17 s) Count:11 0.1% GSM (Keypad): 10 s (10 s) Count:2 0.1%

sleep_broadcast (Android System): 10 s (10 s) Count:334 0.1%

Proximity Partial (Android System): 8 s (8 s) Count:44 0.0%

================ Kernel Wakelocks ================

====================== Alarms (requires root) ======================

====================== Network (requires root) ======================

========== CPU States ==========

122.88 MHz (): -0.0%

245.76 MHz (): 26.3%

368.64 MHz (): 0.3%

768 MHz (): 1.0%

806.4 MHz (): 0.1%

1.02 GHz (): 0.4%

1.2 GHz (): 0.4%

1.4 GHz (): 8.5%

Deep Sleep (): 63.0%

================== Reference overview ==================

Custom: Reference custom_ref created 2012-08-17 11:18:36 (Wl: null; KWl: null; NetS: null; Alrm: null; Proc: null; Oth: null; CPU: null)

Since charged: Reference since_unplugged_ref created 2012-08-22 22:39:46 (Wl: 1 elements; KWl: 37elements; NetS: 0 elements; Alrm: 1 elements; Proc: null; Oth: 3 elements; CPU: 9 elements)

Since screen off: Reference since_screen_off created 2012-08-17 11:18:36 (Wl: null; KWl: null; NetS: null; Alrm: null; Proc: null; Oth: null; CPU: null)

Since unplugged: Reference since_unplugged_ref created 2012-08-22 22:39:46 (Wl: 1 elements; KWl: 37elements; NetS: 0 elements; Alrm: 1 elements; Proc: null; Oth: 3 elements; CPU: 9 elements)