Like all Brando junk, this thing makes no sense yet makes perfect sense. It’s a battery that you wear like a wristband. The site has this to say:
Have you ever had experiences that devices are running out of battery while in use? It is disturbing when you are playing the PSP/NDS game or chatting happily with friends on the phone, etc. Now! USB Wrist Band Battery won’t let these situations happen anymore! You can charge your devices in a flash before battery exhausts!
Don’t let these situations happen! Just don’t!
The kit costs $35 and charges via USB.