cr2016, cr2032, cr2025, cr2050, 3 volt coin cell batteries
Amazon.com: CR2016 3V Lithium Coin Battery – 15 Pack CR 2016 Cells Batteries 3 Volt for Car Remote Control Toyota Camry RAV4 Key Fob Timex Watch Garage Door opener Sensor LED Candles
CR2016 Lithium Coin Cell Battery Pinout, Datasheet, Equivalent, and Specifications