What is the difference between an LR44 and AG13 battery?

Tenergy AG13/LR44 1.5V Alkaline Batteries, 20pk - Tenergy

20 PCS LR44 AG13 357 LR1154 Alkaline Battery 1.55V Button Cell for Wat

Button cell LR44 - comparison type, data and identical replacement

Everything You Need To Know About The LR44 Battery

MJKAA 10pcs LR44 AG13 A76 357 303 SR44 1.5v Button India

20 Pack of LR44 AG13 303 357 SR44 - 1.5 Volt Premium Alkaline - Import It All

Simply Brands — Car Key Battery - 1.5V Alkaline (A76, LR44. AG13)

LR44 AG13 357 A76 303 SR44 1.5V Button Cell Batteries for thermometers 6pcs

Buy the Maxlife BAT44-A2 LR44 Alkaline Coin Button Cell Battery. 2Pk. aka AG13 ( BAT44-A2 ) online