The chagers a Hitec CG-340 charger, I use it on 1A-6-16 Nicad battery setting. After I charge it I checked it with my Fluke designed for GM troubleshooting (Electrical DVOM) and it read in the - negative readings-weird. Either bad charger or Nicad pack? The battery got fairly warm when it charged. I think the output of charger while recharging battery was 15.9 V.