Engerup P108 battery for Ryobi tools, repair, test and review

I wanted a new battery for my Ryobi cordless tools and decided to gamble on buying a Energup battery off of amazon. It worked fine at first then started only holding half a charge then died all together. I took it apart to see what went wrong, fixed it, and did an amp hour test on it and the replacement battery I got from Engerup and a real Ryobi battery pack.