I see something here about using Android System Info.
Good app, I use it myself.
For this sort of problem - if you haven't snagged it already - Gsam Battery Monitor.
It's top notch and it's free and it's my go-to tool for all battery issues.
Discharging faster than charging can be any combination of -
- Phone unable to sleep properly
- Caused by wakelocks or runaway services
- Gsam lower left corner - it's a Hoover, shows what's sucking what.
- Next screen, the title at the top - it's a menu - snoop around some.
- Rouge processes that have gone haywire
- Wifi signal issues
- While I'm at it, if you're on wifi while this is going down, snag Wifi Analyzer, also free, and make sure that you're not on a shared channel with the same default router name as your neighbor.
- Network stack changes from rom to rom - yeah - that can expose a problem elsewhere and fool you as to the cause.
- Fix those at the router.
- 3G signal issues
- Gsam has a nice graph, works in landscape.
- How's that 3G signal - nice and steady, medium or better, or jumping up and down?
- When your screen is off, is it showing the device asleep?
There's a few things to get you started, I think they'll serve you well.
Unless - it's a hardware problem.
In which case, it'll still serve you well, because if it's nothing listed above showing up, then something wonky is happening with hardware or rom/hardware combo.
That happens. Just is what it is.
Hope this helps!