Ozito Power Xchange 4Ah Battery Strip Down
JLCPCB Prototype for $2(Any Color): https://jlcpcb.com
Teardown of the Ozito Power Xchange 4Ah power tool battery.
https://batterybro.com/blogs/18650-wholesale-battery-reviews/18880255-battery-chemistry-finally-explained
http://www.micro-bridge.com/news/news.asp?id=1973