The Metz B-46 NiMH Battery Cluster Set for 45 Series provides a rechargeable NiMH power option for that series of handle mount flashes. The included NiMH 45-57 battery allows photographers to shoot a minimum of 220 flashes at full power; a 175% increase from the previous NiCad 45-40 battery. The item comes supplied with the 970 Universal Charger.
B-46 NiMH Battery Cluster Kit for 45 Series Flashes - with Universal Charger
970 Universal Charger