Duracell® Button Cell Battery, 309/393, 1.5 V DUR309/393BPK - Walmart.com
AG5 / 309 / 393 / LR48 Button Batteries (10 Card)
Duracell 309/393 Silver Oxide Button Battery, 1 Count Pack, 309/393 1.5 Volt Battery, Long-Lasting for Watches, Medical Devices, Calculators, and More : Health & Household - Amazon.com