Energizer 392 Coin Cell Battery Replacement for the GP 392 - Walmart.com
Amazon.com: PKCELL AG3 1.5V Battery LR41 392 384 192 Button Alkaline Cell for Digital Thermometer- 5Count : Health & Household
GP GP392 replacement battery
Amazon.com: Tenergy 1.5 Volt Battery Button Cell LR41, ag3 Batteries Equivalent, Ideal for thermometers, Watches, Laser Pointers, Small Toys, Portable Electronics, and More - 40 Pack : Health & Household
LR41 AG3 15 Volt Alkaline 20 Batteries Fits 392 192 SR41 384 736 L736F Full List Below - Newegg.com