can someone explain how the sb with 2 - 3volt cr123 batteries,that are putting out 3.6volts when charged,how the sb puts out 6volts,wouldnt it be 7.2 volts,or maybe it drops under load ,im just not sure how that works,and explaination is needed if possible,im on the fence about buying one,only because of that reason,i would be greatfull if someone can explain this,thanks much k9frog