Welcome to Android Central! Poor cell signal is a common battery drain, even if you're not trying to make a call. In the face of poor signal, the phone uses more power to try to latch onto signal. If you're in an area with no signal, it may be best to turn on Airplane Mode until you leave that area. If you're in Airplane Mode, you can always turn wi-fi back on.
It may be helpful to see more battery stats.
Charge up to 100%, then let it drain to 20-30% with normal usage, without charging in between. Then show us:
1. The main
Settings>Battery screen.
2. The fullscreen battery graph screen (which shows Awake time and Cell Signal Strength).
3. The Screen category (to see total Screen On time).
4. The Cell Standby category, if present (to see Time Without Signal).
http://forums.androidcentral.com/amb...d-central.html
I merged two duplicate threads, by the way.