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In a question I was doing, it said a flat car battery has 7.6V whereas a charged one has 12 V. What is the physics behind this?

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closed as unclear what you're asking by Kyle Kanos, Jon Custer, Gert, ZeroTheHero, M. Enns Feb 12 at 17:55

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

  • $\begingroup$ That is chemistry. Electrochemistry. Redox potentials, that kind of thing. $\endgroup$ – Pieter Feb 11 at 20:56
  • $\begingroup$ this topic is treated in detail on most battery-technology sites. $\endgroup$ – niels nielsen Feb 11 at 22:49
  • $\begingroup$ I'm voting to close this question as off-topic because it's a chemistry question $\endgroup$ – M. Enns Feb 12 at 17:55