... Number 6, R40. Description:Zn/Mn battery, R40battery, No.6 battery, high-power battery, environmental battery, Hg ,lead and Cd free, ... high capacity, high magnification Chemical system Zn/Mn(Zinc/Carbon)Nominal voltage 1 ... 2, Do not attempt to decomposition, recharge, heating the battery. 3, Do not mix old and new batter, ...