Tenergy 1.5 Volt Battery LR44, Button Cell LR44, ag13/LR44 Batteries Equivalent, Ideal for Watches, Laser Pointers, Small Toys, Portable Electronics, and More, 20 Pack : Amazon.ca: Health & Personal Care
Battery Equivalent Size Charts - G&T's Original Warehouse
Pentax 67: Four LR44 as replacement for 4LR44/PX28/A544/476A battery