An electrical device has an electrical device body, a rechargeable battery pack that can be removed from the electrical device body, and a fastening unit for attaching the rechargeable battery pack to the electrical device body. It is provided that the fastening unit is designed such that electrical contact between the electrical device body and the rechargeable battery pack is established during an attaching motion.

 
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< Safely removable battery pack

> Integrated circuit for controlling charging, charging device using the integrated circuit, and method for detecting connection of secondary battery

> Battery pack and method for protecting batteries
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