I have never had a coin type battery leak. Even after tossing bicycle lights into my attic where they sit for 5 years in extreme temperatures.
Was thinking the same. Never hear about watch batteries or hearing aid batteries leaking.
I broke the hoop where my Key Fob connected to my keychain [hissy-fit] truck built in Sept. 97 F-150. It rode in my console for 20+ years, got it out last winter, still worked - original battery, obviously these type batteries don't corrode.
