I bought a phone battery on amazon. Looked legit, was the top result for my phone. It was counterfeit and wouldn't work. I don't even know how to get a battery because the phone stores didn't have it anymore. Can't trust amazon.
It was a good reminder that lithium ion batteries are dangerous. Not sure I'd trust buying them on Amazon.
The funny thing is that the Samsung website sends you an Amazon seller.
I noticed this the second time I needed a battery. The batteries look identical. The only difference was that the counterfeit battery only lasted a couple months.
Li-Ion batteries won't necessarily work after being stored unless they were charged to a specific level and stored in a very specific way. And you have to go back and check the charge and maybe recharge them regularly. More in this article:
http://batteryuniversity.com/learn/article/how_to_store_batt...
Needless to say none of this would have happened if it was sitting on a shelf in some warehouse for 3 years.
When a product with batteries gets EOL'd and uses non-standard (e.g. AA/AAA, CRxxxx coin cells, 18650 Li-Ion) cells and/or proprietary controller chips, the specifications (mechanical, electrical and EC firmware source) must be made public.
To ensure that this gets followed and e.g. devices from insolvent manufacturers don't end up without reasonable possibility of new batteries, any manufacturer / importer of any device into the country must deposit said information at a public library/archive, similar to FCC/CE certification records.