Zinc chloride batteries have the advantage that their purchase price is lower . They are mainly suitable for equipment with constant but low consumption , e.g.: alarm clocks, clocks, remote controls, etc... (AAA/R03 /UM4/1.5V ) BC batteries Extra Power ZnCl 0.00% MERCURY - Mercury (Hg) 0% Cadmium (Cd) Sales package: ecoblister of 12