GoGo PowerPack 3300 - USB Portable Charger for Mobile Gadgets Recharges mobile gadgets on the GO with no electrical outlet in sight. It's rechargeable! Use for years! Our most powerful batterypack! Recharges most gadgets three to four times before the PowerPack needs recharging. By itself, charges all mobile devices that have a USB power cable. If it can be charged up on your computer, the same cable fits the PowerPack's USB power port. Two connectors included free: one for iPods/iphones + a mini-USB compatible with many MP3s, PDAs, cell phones and GPS nav devices. Thirty-plus optional connectors add 100s of compatible mobile gadgets