Cables Unlimited BAT-9000 BatteryBoost for iPhone 3G and 3GS – $20 + Free Shipping
Buy.com via Amazon has the Cables Unlimited BAT-9000 BatteryBoost for iPhone 3G and 3GS for $19.99 with free shipping, a savings of $10. Slide your iPhone 3G or iPhone 3GS into the BatteryBoost and gain a couple extra hours of battery life.
