All4Cellular offers this Dexim P-Flip Foldable 2,000mAh Solar Power Dock for iPhone 3G / 3GS/ 4 / 4S
with free shipping
. That's tied with last month's mention and the lowest total price we could find by $30. It purports to add six hours of talk time, ten hours of video, ten hours of games, or 40 hours of music. Deal ends March 6.