2 x Energizer + 2 x Duracell AAAA Alkaline Batteries
Amazon.com: Duracell AAAA 1.5V Ultra Photo Alkaline Batteries, 2 Count Pack, AAAA 1.5 Volt Alkaline Battery, Long-Lasting for Cameras, Glucose and Blood Monitors, and More : Health & Household
Best Buy essentials™ AAAA Batteries (4-Pack) BE-BAAAA4PK - Best Buy
Amazon.com: Energizer AAAA Batteries, 1.5 Volt Battery AAAA Alkaline, 2 Count : Health & Household