I'd like to find the third-party company that makes canon batteries. No one in the world has yet to find this so-called company. If so please tell me!!!!
My Canon batteries say "Made in China." A couple--but not all--say that the cells are Japanese (probably--I hope--Panasonic). If all the parts were imported into China, it would say "assembled" in China, so I have no confidence that "made in China" can mean the components are also made in China. If it doesn't identify components made elsewhere, I must presume "Made in China" alone means components and assembly are all Chinese.
It does mean (I hope) that QC was to Canon standards, but there is no reason third party companies can't adhere to similar standards.