I am building a system which uses multiple components, each has varying voltage. The large motors use a voltage of 14-16 Volts, thus there are several batteries wired in series, providing this voltage. Now, there are other components such as microcontrollers, multiple sensors and smaller servos which use a lower voltage of 7 Volts. Say I have two batteries, could I use each one individually, while also having them connected in series configuration? I am aware they may be discharged unequally. But other than that I don't see a problem. This picture is a concept. Thanks, -Jarfi.