Batter Drain on Standby

[Budster]

Hello, I have been a “lurker” here for some time and this is my first post. I have recently got a Sprint TP2 about two weeks ago.
I think this is a great phone. I’m having a quirk that I’m not sure I should be concerned about concerning battery life. I have been playing with the phone a lot, an my first impression is that it has very good battery life for the amount of “playing” I have been doing; however, there seems to be some heavy drain when the phone is on “Standby” ; often I shut my phone down at night and boot it up the next day. A few times however, I have just left my phone on standby mode, with mostly a full charge, and tried to open up the screen some 12 -15 hours later and the battery was completely drained. I guess I’m asking; is this normal ? Is it possible I have something running in the background, or a setting on, to cause a heavier than normal drain when it’s on standby,? I have not added any applications other than appearance stuff such as clock- remove curtains and such.
Thanks much in advance for any solutions or response
Bud