Its actually very simple. If your batteries are in parallel (quick Google search will clarify if needed) then ohms law works out the exact same way as one battery would. However, if the batteries are in series then the voltage and thus amps are doubled which obviously is involved in ohms law. As a side note when batteries are in parralel their mahs are doubled and voltage stays the same as previously stated (parralel also will also have double the amp limit of just one battery the same goes for being in series as well) I'm not 100% sure on that so a little clarification may be needed on my part with the amp limit part.
How does ohms law work with 2 batteries
- Thread starter Mden89
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I only thought is was in series when voltage got doubled and parallel when amperage doubled? Im still a newbie but i seem to have read it somewhere. Like i said feel free to correct me.
basically the load is divided equally to each battery in a parrellel circuit. Each battery works half as hard making for twice the battery life. In a series circuit your voltage will be doubled. 2 25 amp batteries will equal a 50 amp output.
And it is also a very smart Idea if you are using two batteries to match them up. Label them so you know those two are dedicated to your box. Never borrow one of the pair to use in a mech mod or single battery box. Make sure they are charged the same amount of time and used for the same amount of time. That way if you build something that needs some serious amps you don't have to worry about one of your batteries taking more of a load than the other
This is the most concise way to answer your question. Mainly because the technical and pratical application of the issues are in conflict. Technically you still have 20A batteries, and that needs to be REMEMBERED, BUT you can GET AWAY with using the pair as if it were one nearly 50A battery.
BY the way you should not try to draw 20A from a 20A battery, can be hazardous to the device.
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