http://www.nikonchat.com/nikon-battery-en-el5/

Why is my Nikon P-90 battery die so fast?
I just bought the Nikon P-90, so I applied to the light stops flashing and use. everything was going well until even 20 hours after the batter dies. i do not have on the whole 20 hours, obviously, is this normal for this battery? is an ion Battery EN-EL5 3.7V 1100mAH
Digital screens suck a lot of energy. Has the screen for even a couple of hours I had certainly enough to drain the batteries. If (Jim A takes a long time because it has a compact – no. SLRs usually do not use the screen for what they are wonderfully well in the batteries).
SANGER 3.7V 1150mAh Replacement Digital Camera Battery for Nikon ENEL5 from Dinodirect.com