Hello I have bought a second hand savage flux hp,it came with a IMAX b6 charger,and overlander 2s 3250 batteries,and setting the charger at 3.3a and 7.4v they charge fine,but I bought nano tech 3s and 2s 5.0 batts,setting the charger to 5.0 amps it lets you start charging batt but cuts out a second or so in to charge and cuts charger out,only way is to set charger to 4.0a and it stays charging,what would happen if I charged a 5.0 batt at 4.0 on charger,thanks