I'm just starting electronics and I find myself not understanding voltage at all. In a simple circuit, let's say a 1.5V battery connected end to end it's easy to see how there's a 1.5V drop.
However what I don't understand is how a series of say 2 batteries, each 1.5V results in a 3V drop. My understanding is that a voltage of 1.5V pushes electrons out of the first batteries negative terminal and towards the positive of the 2nd battery. Then inside the 2nd battery there is no physical interaction between the anode and cathode. Otherwise batteries would be complete circuits in and of themselves. So how is the 1.5V carrying over to the 2nd batteries negative terminal to result in a combined 3V push?