... % mercury.4.Widely application,especially in industrial use.5.High capacity&low internal resistance; Built-in safety protection mechanism.6.No ... , etc. J & Y provide single cell or battery pack with different capacity and combined wayNormal models: AAA, AA, A,SC,C,D ... ,1/2D, 4/5D etc. Lithium polymer: variety of dimension & capacity for choose 9V battery; Lithium battery 18650, 18490,18500, 14500 ...