[marknorton]

Keep in mind too that this is the battery's first "outing". The discharge profile may well change as the battery goes through its first few charge cycles. Also, other factors such as display backlight brightness and temperatue may affect the result.

Ball park, you can say this camera consumes a little over 1 watt of electrical power while it is sitting displaying an image in "Play" mode. The photographer admiring that image is burning about 120 watts...