‘Wish you could have faster cordless charging for your iPhone than the measly 5W you get with Apple’s MagSafe Battery Pack … ‘In order to get 7.5W charging on the Go, you’ll need to update your MagSafe Battery Pack to firmware version 2.7 … Besides the battery pack, Apple also offers a $35 Wired MagSafe Charger, various MagSafe-enabled silicone iPhone cases starting at $39, and a range of $59 leather wallets that Snap onto the back of your iPhone using the MagSafe Technology.