1.5 VOLT starter battery High capacity emergency battery High magnification and environmental R40 zinc-manganese dry battery is the most optimal ... owns the stable voltage and a cheaper price than lead battery, so it is widely used in railway, communication, ... room and so forth. Description: Zn/Mn battery, R40battery, No.6 battery, high-power battery, environmental battery, Hg ,lead and Cd free, high ...