For starters, we'll pop out that battery.

And the SD card, if you had not done that already.

The battery tolls in a good 720mAh @ 7.4 V with a capacity of 5.3Wh.

And ... there is a battery-eliminator for the G9 if you happen to take lots of photos indoors. Proof? A trap-door like mechanism on the side of the battery compartment -- for the wires to go in and out.