how do batteries in parallel work?

[Kuciwalker]

I understand how resistors, inductors, and capacitors in parallel work, but we never actually found out how two emfs in parallel add together. Please help, gods of physics

[KrazyHorse]

They'll operate at the potential of the smaller battery. The applicable rule is the kirchoff loop rule: the potential drop across a closed loop is 0

[Kuciwalker]

So if the two batteries have the same voltage, it'll just be as if you doubled the energy stored in it and nothing else? w00t

[KrazyHorse]

Yes. obviously.