Energizer 389BPZ Coin Cell Battery, 1.5 V Battery, 52 mAh...
Amazon.com: Duracell 389/390 Silver Oxide Button Battery, 1 Count Pack, 389/390 1.5 Volt Battery, Long-Lasting for Watches, Medical Devices, Calculators, and More : Health & Household
40 AG10 LR1130 LR1131 389A 389 1.5 Volt Alkaline Button Cell Battery USA US Ship | eBay