The “Wrist Charger Bracer of Battery Life +2” straps comfortably to your wrist and plugs in to just about any electronic device you like. It’ll power cell phones, mp3 players, gaming systems, or any device compatible with mini USB. It includes a 1500 mAh Li-ion battery and delivers an output of 5Vdc at up to 500mA. A series of LED indicators, for power-on, and a four-level power meter. It measures about 256mm X 34mm X 12mm and weighs about 290g. It can be recharged using any USB-style ac-input charger that delivers an output of 5Vdc
It comes with a variety of connectors including: Apple 30 Pin adapter works with items listed and older (for iPhone 4/4S, iPad 3rd Gen, iPod 6th Gen, iPod Touch 4th Gen, iPod Nano 6th Gen, and iPod Shuffle 4th Gen); Mini USB adapter; Sony PSP adapter; NDS Lite adapter (not 3DS); Nokia 2.0mm adapter; and Samsung F480 adapter.
A second model, called "Magic Juice" delivers up to 3000mAh for portable devices, tables and mobile phone handsets, and comes with a travel case and ac adapter. While it has double the battery capacity, it comes with fewer adapters and includes only a Micro-USB connector tip and a Mini-USB connector tip. It includes a built-in flashlight to provide emergency light in dark cars, doorways, rooms, etc. and includes a flashing strobe setting. This device measures 4" X 0.7" X 1.13" and weighs 2.88 ounces.