So, what happens if you connect 2 9volt batteries together?
Is there a chance they explode? What if one is dead, the other fresh. Will the fresh on replentish the dead one?
If you put them together in say … an oven or a microwave oven or a thermonuclear over … there is a small chance they will explode.
Other then that the only danger would be to your tounge.
Will the fresh on replentish the dead one … no - if you mean recharge …
If you connect them together you will get two very hot batteries and a lot of wasted electricity.
If you connect them positive-to-positive and neg-to-neg, the weak one will drag down the strong one.
If you connect pos-to-neg and neg-to-pos, well, friedo said it.
Eh? I’m not sure what this means, but with any interpretation I can think of, this is not true. Connecting two batteries in parallel will always result in more available power than either one alone.
That’s true if they are connected with a load, not true if you connect a dead battery and a charged one in parallel.
Padeye:
not true if you connect a dead battery and a charged one in parallel.
Quite. If we’re talking about just two batteries, plus-to-plus, minus-to-minus, you have a circuit with two opposing voltages: the stronger battery will drive current backwards through the weaker. Depending on the specifics, this can happen even with a load, if the weaker battery provides a lower resistance path than the load.