How can I convert a device that runs on AC to battery power and how much power will I need?
I'm making a visually accurate Pipboy (basically a wrist mounted computer) from the game Fallout 3 for a costume. I found an item exactly the right size that does what I want it to do, which is to play mp3's while displaying a photo slideshow: a Hannspree photo alarm clock. The only problem is, it plugs into a wall outlet and has no internal battery. I thought I could just wire it to a battery pack but I want to be sure.
The AC adapter that came with it has an input of 100-240V 0.2A and an output of 5V at 1A
How do I convert this thing to be portable and what kind of batteries/voltage do I need to run it for several hours while I'm at a convention?