Mixing this battery with other batteries or metal ones can cause the battery to short-circuit, deform, leak, overheat, or explode.
Insulate the (+) and (-) poles of each battery with insulating tape, and put them in the “button battery collection can” provided at your local electronics store, watch store, camera store, etc.

For the correct disposal method of batteries, please refer to the contents related to button battery collection by the Battery Association of Japan.