You can pick up 240VAC or 12VDC power supplies from local electrical outlets with adjustable output voltages. I have a couple with a small slide switch on the side that work from 3 v to 12 with 6(?) steps in between.
The Camera will accept any voltage between 7 to 8.5v, it has some power management inside. I just happen to have a 7.5VDC supply that came off a small network hub I think. Very fortuitous indeed.
And I've got 2 Canon batteries, one of which is slightly swollen, not a good sign so guess which one is going to be ......
I just love DIY ...
