[HTC One X] Foggy79:
Hi everyone,

Like many others I had a terrible battery drain in std-by after upgrading to JB. I've already posted some troubleshooting I performed somewhere else, but since I wanted to update this from time to time and to keep everything a bit together, I'm making this topic, don't shoot me :fingers-crossed: It's my log/reference how I'm fixing my battery issue, and some help for other ppl trying to fix their issue to.

Feel free to add your thoughts.

So, some facts of my case:

- Phone is locked, all stock, with JB.

- Std-by drainage after OTA upgrade to JB with everything working on ICS, was +- 20% over night (7h), no data/wifi/BT/sync or anything else.

- Something is waking up my device every half hour to drain battery.

- Disabeling Google Now, NFC, Location stuff, Sync, etc... did not solve the massive drain in my case (it will help ofc, but is not the root-cause).

- Factory reset followed by the installation of all my apps and settings at once did not solve my issue.

- Factory reset with ONLY activating my google account during initial setup (and pulled in my contacts). Nothing else installed or activated/synced

for testing purposes

. =>

Solved the std-by drainage on my phone

.

- At this point I can tell for sure that in my case, a rogue app (that worked fine on ICS but not on JB) is causing this problem, not JB or my hardware.

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What I did then:

I tried a few battery apps mentioned in other posts to find out where the problem was, but I was not able to find anything usefull.

Tested in the other direction... Did a complete factory reset again, with none of my additional apps installed (only my contacts), no google now, location or syncs.

The result was 14h with only 4% gone! Good result imo.

So I planned installing a few apps at a time/day to see when it starts to drain again, so I can isolate the problematic app.

Yesterday I installed 6 of my most used apps + a few sync profiles last evening, still a very nice std-by drain this night (was still on 100% this morning lol).

For all those with std-by battery issues, if you don't mind a full factory reset and don't need all your 150 apps at once, try it like I did (clean with no apps, sync or data) to see if std-by drain is back to normal (for testing purposes). Then install 5 to 10 apps per day to see if everything remains ok. My device works as it should be now.

I know a lot of ppl prefere not to wipe their phone and want to find the problem via battery monitoring apps, no problem with that, this is just the way I did it, it takes some time but ok, at least the drain is gone now :victory:

I'll update my findings regulary untill I bump to the winning app :)

Greets

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These are the apps/features i've installed so far and NOT causing the std-by battery drainage (20% or more in 7h):

In std-by at night, the wifi/data/BT and sync are off at my phone ofc.

8h std-by at night, still at 100% in the morning

aCalendar

Apex Launcher Pro

ES FileExplorer

Fancy Widgets

Power Toggles

Facebook synced

Google Drive

Twitter Synced

Smooth calendar widget

***

9h std-by at night 1% drop

Green power

Google Location Service (System Setting)

Dropbox + auto photo upload

SwiftKey 3 full + personalize

Swiftkey flow beta

HLN

XDA Developers Premium

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12h std-by at night (including 3h with wifi/data and sync) = 3% down

11 new apps installed yesterday.

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More apps installed, drain is still ok.