Batteries can not be shipped airmail

[Marra2630]

Hello, not understanding why new and refurbished computers, tablets and phones can be airmailed across the world but the batteries for these different computers and tablets can not go airmail? New computers, tablets and phones have batteries in place inside the belly of airplane cargo. But they won't send batteries airmail. Why? It just makes no sense to me. I know they fear fire in cargo but the new and refurbished have the same chance. The web, Amazon vendors, Ebay vendors, etc. has them for sale but no one will ship airmail. I need a replacement battery for my Nexus 7 (2012) model. Still works just fine for all my needs, surfing around the house and taking with to lunch, etc.

 

[B. Diddy]

I think the concern is that batteries on their own have exposed contacts, and are therefore at more potential risk for short circuit: https://www.faa.gov/about/initiatives/hazmat_safety/more_info/?hazmat=7. Batteries within a device don't have their contacts exposed.