What's the difference between LR44 and AG13 batteries? - Quora
LR44 vs. 357: Are LR44 and 357 cells interchangeable?
GutAlkaLi LR44 1.5V Alkaline Button Coin Cell Batteries - Pack of 10 for Many Small Electronics, Including Watches, Calculators, and Toys - Compatible with AG13, 357, 303, SR44, and A76 Battery.: Amazon.co.uk:
LR44 Battery - Equivalents, Cross Reference Charts and Replacements