Before checking the solders, take the bottom internal out of the shell and try it without the shell (the deans connectors might not be making good connection)
Let us know and we'll take it from there
Same issue out of the shell. I re-soldered everything in the top cap and the pos batt leaf. Still firing once, then saying weak battery. I'd like to re-solder the board, but I need some acetone to loosen up the CA.