Tanga offers this iPhone 4 to iPhone 5 Dock Charger Adapter in White for $5.99 plus $3.99 for shipping. That's a buck under our December mention and the lowest total price we could find for a comparable item by $10. (Meanwhile, Apple charges $29 for its model.) This Apple Lightning-to-30-pin adapter is also compatible with select iPad and iPod models. It's available in short or 6.5" corded sizes.