I left my tab with wifi and bluetooth on during the night. Not sure how much battery I had left yesterday but this morning it I had 90% left and it wasn't fully charged yesterday so I think mine is fine.I'm having horrible battery drain as well with the p7310 in standby, even with wifi turned off. Battery life when used is great but it seems like it won't really go into deep sleep. Anyone else having the same problem?
Install "CPU Spy" to see if it really enters Deep sleep. My tab has 94% deep sleep according to CPU spy.