Everything You Need To Know About The LR41 Battery
HC 4XLR41: 4x Ansmann HyCell alkaline button cells, LR41 at reichelt elektronik
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