So I apologize for the beginner question... I have a hexapod that I'm working on with 12 servos (6x HS-485 and 6x HS-625). They draw 150mA with no load running, and run at 6V. The battery I have is pretty heavy (6V 2800mA - http://www.robotshop.com/productinfo.aspx?pc=RB-Hpr-05&lang=en-US). I was wondering if I could use a lighter LiPo battery, though I'm only finding them in 7.4V packs. Is there an easy way for me to reduce the voltage for this, or maybe a different source of 6V batteries that are lighter. Any help would be appreciated. Thanks!