I am currently building a robot that has one 12V battery for each drive motor. The system was originally setup so that the two motor/motorcontroller/battery systems were completely separate. After testing, I discovered that one motor is used significantly more resulting in the batteries discharging at different rates.
I would like to leave the batteries on opposite sides of the robot for weight reasons. Would it be possible to connect the batteries so they would recharge each other when one battery was low?