Aluminum Macbook battery drains when closed / asleep

My new macbook (aluminum, 2.4ghz) always has a drained battery when I turn it on in the morning.
I typically put my fully-charged macbook to sleep in the evening by closing the lid. I do see the pulsing light, so I assume it is asleep. However, when I open the macbook the next day, the battery is heavily drained or empty. In the latter case, I need to connect power before it will start.
Anyone else have this problem? Ideas?

I do understand that sleep mode does consume power, and consumes more power the hibernating, thats what makes this issue so illusive. The thing is that it battery is being drained excessively and at a higher rate. My previous 2.4ghz black macbook didn't even drain half as fast as the new one. I should know I was using it less then two days ago.
At any rate, I reset the SMC twice today, and actually just reset the PRAM for good measure. It could be me playing mind games with myself, but I think it helped. I put the computer in sleep mode for approximately 2 hours and it drained about 1%. I do think thats more along the lines of normal sleep mode power drainage. I will test again tonight and repost.
Thanks for the help.

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Aluminum Macbook battery drains when closed / asleep

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