Couple brain farts.
I had a gens ace fail on me. When I figured I had nothing to loose , I took the battery apart and was amazed at the weak connections. In fact so weak it blew ,so I was able to fix and reuse pack. I beleive I seen a video on you tube saying this was a common weak point on gens.
Also I wonder how many lipo battery companies there are? like everything else these days there could only be 2 chinese factories with a thousand different stickers of different companies to stick on the batts.lol