Step 1: Tools and parts needed:
5 volt regulator
two or one small solar panel
exacto or utility knife
female usb port
Step 2: Prep the usb port
Step 3: Soldering the USB to the 5 volt regulator
solder the red wire from the USB port to the 3rd leg of the regulator (3rd leg is output) then solder the black wire to the middle leg (middle is ground)
in the picture you cant see the writing on the regualtor but it is there. be sure to have the writing side facing up!
Step 4: Prep the wallet
first off, remove all the wallets contents then cut two small holes on each side of the wallet (as seen in picture)
These two holes allow the solar panel wires two run through the wallet while out of sight.