Environmental R40 dry cell High capacity, high magnification Widely used in railway, ... , Number 6, R40. Description:Zn/Mn battery, R40battery, No.6 battery, high-power battery, environmental battery, Hg ,lead and Cd free, high capacity ... ideal)6, R40 is the best price performance in dry cell, It can be single use only, also can form ... periods of time.Company introduction Environmental R40 dry cell