1/10 is the best charge rate for the batteries and if you are over the time needed for a full charge by a few hours it isn't going to hurt the batteries. If the rate is higher than this, then you should watch the time closely or have electronic sensing which a lot of the new chargers have. A Triton charger is a good charger. [8D] http://www2.towerhobbies.com/cgi-bin...&I=LXMAJ0&P=ML