[Product description] it is suitable for remote control, electric toys, clocks, doorbells, electronic sphygmomanometer, shavers, etc. It is widely used, mercury-free and environmentally friendly, and the power is durable.

(Two for one board, two for one board, four for two boards, and so on.)

note: Please confirm that the battery is positive and negative. Do not charge, disassemble, fire, and mix the battery with old batteries or different types of batteries. The battery should not be taken out for a long time. The battery should be kept out of reach of children, away from the fire source.