Abstract: A rechargeable storage battery and miner's cap lamp apparatus includes a headpiece and a cable member which connects the headpiece with the battery. The battery is constructed with a detachable top in which is mounted protectively housed switching means for actuating a plurality of rechargeable cell groups contained in the battery. Typically two lead-acid cells may be provided in the battery and connected in series to provide a four volt output in a conveniently portable sized unit for miner's use.In the battery and detachable top construction, the rechargeable battery cell groups are further provided with positive and negative charging terminals located on and extending through the battery top, for example at opposite sides thereof, in a position to connect with suitable charging rack apparatus which avoids charging the battery through the headpiece.