hi guys,i'm working on a robot that uses 2 pololu metal gear motors as drivers.these are 6v motors.i use a 12v 1500mAh battery pack(1.2v cells x 10).i use 7806 to convert 12v to 6v for motors.my question is as my motors drain high curr ent,battey voltage drops to 8v quickly,after this point regulator dont work properly as they need atleast 8v input to operate.so i have to recharge the battery.bt batter still have 6v,which i cant use.it seems pretty waste of battery power.any idea how to solve this and use batteries maximamly? thanks