A:鈕扣型電池並不一定都是水銀的,要看其型號及組成成分,如: 一次性電池: CR:Lithium Manganese Dioxide Battery SR:Silver Oxide Battery LR:Alkaline Battery ZA:Zinc Air Battery 二次性電池(可充電電池): ML:Lithium Manganese Dioxide Rechargeable Battery TC:Titanium Carbon Lithium Rechargeable Battery