# How Does Connecting a Battery in Series Affect Current Flow

Background:

I am creating a circuit to run electronics and motors. The some of the electronics are 5V some are 12V and the motors are 24V. I have a small universal 12V battery for the electronics I run it through a 5V regulator for the 5V electronics. In addition I have a huge Optima Yellow Top 12V battery. I want to create a 24V circuit for the motors by connecting the small 12V battery to the large optima 12V battery in series.

My Question:

How would current flow through this circuit? In other words, do the motor take an equal amount of current from each battery? Would the current in the wire from the positive terminal of the smaller battery to the negative terminal of the Optima battery be the same as from the optima positive terminal to the smaller battery negative terminal (the motors will be between the optima positive and the smaller battery negative). Will the optima battery be able to supply the majority of the current? If I hooked another 12V battery in parallel with each of the 12V batteries, how would current be drawn from that battery?

Thanks for any help, Joel