AA Touch Screen External Backup Battery Charger for iPhone 3G/3GS/4G and iPod(IP-28BT)

Use 4 standard or rechargeable AA batteries to power your device. A convenient portable charging solution
Engineered with reverse polairty battery insert protection. Full lifetime warranty
Advanced internal circuitry prevents device from power surges / overcharging with additional short-circuiting
TipExchange Technology protects investment providing means to upgrade charger tips at lower cost (Tip Included)
Compact and lightweight. Ideal for travel; On a hike; Or on a long bike ride.