My 8900 discharges with very light use after only 36 hours.
I tried the following things but to no avail:
I bought a new battery - no difference
I reduced the screen brightness to 50%
I turned off the LED indicator, the ringer and vibrator.
I do not use wifi or bluetooth.
I do not even use the phone.
And since I bought this device on eBay and am using it in the US w/ ATT - I can't even return it.
My wife's old Curve (w/ light use) takes 5+ days to discharge....