Amazon.com: Vinnic Size LR54 V389 389 AG10 L1131 Alkaline Watch Battery x 10 : Health & Household
VARTA BATTERI V389 SR54 1,55V 85MAH 9494600295
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