RedVikingAirsoft

Evening guys! I have recently bought my first RIF a G&G CM16 SRXL and I bought an additional nuprol N-mag for it which refuses to feed! Do you guys have any recommendations for mags that work with this RIF? Also I have two 9.6v 1600mah NiMH batteries and a nuprol compact intelligent charger with a charge current of 1.5a. How long Should these batteries take to charge? One of them has been on charge for nearly 12 1/2 hours and still isn’t full! Is this normal? thanks in advance RED VIKING