https://www.acehardware.com/departments/lighting-and-electrical/batteries/specialty-batteries/3536810
Energizer Lithium Coin 2430 3 V 0.29 mAh Keyless Entry Battery 1 pk Mfr# ECR2430BP - Ace Hardware
3 volt battery is designed to power smaller electronics for hours. The lithium core provides high energy to weight ratio. Use with watches, calculators and...