Apple Insider checked out the iBolt ChargeDock
A quote from the article:
Touted as "the world's first magnetic charging dock for your iPhone," iBolt's ChargeDock has a unique gimmick. The ChargeDock itself has four magnets, to hold the phone in place. The user's iPhone connects to the dock's lightning connector, while the back of the phone connects to the dock, with a pair of metal plates assisting in the magnetization.iBolt ChargeDock Review
This can work either with or without a case. The metal plate is ideally supposed to go between the iPhone and the case, or without a case, between the iPhone and the dock.