Hi, I own two NiMH batteries for my Rally VXL 1/16, and have always used a charger for my Rustler for NiMH batteries. The problem is that the lowest setting is 1.5A and the battery is 1200mAh, so I would assume it would be 1.2A at most. Have I been charging he battery too fast? I have noticed the original battery has not been lasting as long as the newer battery, but I've had it for a while. Could this cause a problem for my batteries?