[masraum]

Originally Posted by Cajundaddy

Thinking strictly about the 18650 used in cordless tools. All of mine are Makita made in Japan except an E-bike battery. That one is made by Giant in Taiwan and *could* have Chinese batteries. It is also a huge battery with a ton of energy. Maybe time to store these in an outdoor shed that is not attached to the house.

And "made in China" is not necessarily a guaranty that you're getting a cheap, poorly made battery if the company that has it made insists upon high standards, but yeah, it seems like it would be a good idea to store it away form the home. I need to come up with a better way to store mine. Even a quality battery can have an issue. QA/QC isn't a guaranty that 100% of the items are perfect and couldn't have an issue after years of use.