I have recently just completed my first dual cell, i have added the 70 mah 2.4v battery out of the se to my zz, and have built a stand alone charger and am wondering using a 300 ma charger what voltage can i use to charge the car before i fry it. also i thought i read an article saying you can change something to make the cars pcb capable of 5.5v or something like that, can someone point me in the direction to that fix, and the parts required?