Maxell Batteries LR44 (A76, AG13) Alkaline Button Size Battery, On Tea – Batteries and Butter
GutAlkaLi 20-Pack LR44 Batteries - 1.5V Button Cell Batteries for Small Electronics with Stable Voltage and Long Lifespan. Ideal for Watches, Hearing Aids, Glucometers, Key Fobs, and More.: Amazon.co.uk: Electronics & Photo
LR44 Battery Equivalent
batteries - Is there a standard replacement for three stacked LR1154 cells? - Electrical Engineering Stack Exchange
LR44 Battery - Equivalents, Cross Reference Charts and Replacements