reVOLT - Rechargeable Battery Pack and Charger for iPod and iPhone

• Provides up to 30 hours of additional music playback and 6 hours of additional video playback
• Capable of fully recharging a completely dead iPod or iPhone battery
• Rechargeable lithium ion battery includes USB charging cable
• Battery Type: Lithium-ion
• Output 5v ~ 500mA
• Additional: Up to 30H/Music, 6H/Video
• Made for: iPhone 3G, iPhone, iPod touch (2nd Gen), iPod nano (4th Gen), iPod classic, iPod touch, iPod nano (3rd Gen)