A system for charging a device and a power cell for the device includes a support base and a holder for the cell. The support base is shaped to define an array of slots. Each slot has an internal profile to complement an external profile of the device and an external profile of the holder. Each slot has charging contacts positioned to connect to contacts of the device and to contacts of the holder. The support base has electrical conductors that connect the charging contacts with a power source to provide power to the device or holder situated in the slot. The holder has a charging circuit to control charging of the cell held by the holder.
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