HSE Ireland - Button batteries are small, round batteries that come in many different sizes and types. Keep all spare and used batteries out of children's sight and reach at all times
Button cell - Wikipedia
Amazon.com: Energizer Holdings EVE2025BP2 Lithium Button Cell Size General Purpose Battery : Health & Household
15 Pack LR44 AG13 Battery - EBC Premium Alkaline 1.5 Volt Non Rechargeable Round Button Cell Batteries for Watches Clocks Remotes Games Controllers Toys & Electronic Devices - 2020 Exp Date :
9 Types of Battery Sizes & Where are they Used?(AA,CR2032)