... 6, Number 6, R40. Description:Zn/Mn battery, R40battery, No.6 battery, high-power battery, environmental battery, Hg ,lead and Cd free, high capacity ... not ideal)6, R40 is the best price performance in dry cell, It can be single use only, also can form batteryApplicable ... correctly (+/-). 2, Do not attempt to decomposition, recharge, heating the battery. 3, Do not mix old and new batter, different types ...