Battery Drain on Canon EOS Digital Rebel

I just started using the camera recently, and found it had a timer to turn
off the power after x minutes. That surprised me a bit, since I suspected
that if the LCD is not displaying anything, I would think the battery drain
is about that of an LCD watch--not much. So I set the timer off, and left
the camera ON. In less than 24 hours it was completely drained. What is it
powering aside from a display that hardly has anything on it? Is it
possible that with a few more recharges that the battery will become more
robust in such situations?
--
Wayne T. Watson (Watson Adventures, Prop., Nevada City, CA)
(121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
Obz Site: 39° 15' 7" N, 121° 2' 32" W, 2700 feet

Most vehicle/deer accidents occur at sunset.
Vehicle deer whistles are ineffective.

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