your first step (as pointed out) would be to replace the battery with a fresh good quality one
if that doesn't work then take the rammer out clean it and put a drop of oil on each of the o rings
failing that strip the HPR and LPR clean and re lube the o rings using some grease (if you have it) or the gun oil should work fine, set the LPR screw so that it's about half a turn in from flush with the LPR housing
also might be best to reset the board to factory standard to rule out any dwell issues
hope this helps
Ryan, team domination