A system comprising a plurality of electronic devices, each comprising a device housing and a rechargeable battery, and a charger comprising a charger housing and arranged for charging said rechargeable batteries, wherein said charger comprises at least one, preferably a plurality of wireless power transmitting coils in said housing and said electronic devices each comprise a wireless power receiving coil in said housing, wherein said power transmitting coils are arranged in an array along an axis, and wherein said charger housing and said device housings are formed such that the power receiving coils of said electronic devices can be placed and held in an array along said axis by placing said electronic devices in an array against each other, such that each power receiving coil has a corresponding power transmitting coil in its vicinity.