I got to thinking while boosting my lawnmower’s battery. It is my understanding that the electrons leave the battery from the negative pole and enter back in via the positive pole to close the circuit. I just never understood why the 2 negative terminals were connected to each other and not to the opposite charge when performing a “boost”. If the dead battery needs energy, why not plug the good battery Negative to the bad batteriy Positive to “feed it”?
I can’t make sense of two batteries both having their negative going to one another…
My nose is bleeding. Help. Thanks!
Edit: typos
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Think of the positive and negative terminals as long metal rods. Current will flow along any connection between these two rods, be it a starter motor, light, or whatever. If your car’s battery is dead, it cannot produce enough current to run the loads. Attaching another battery between the other ends of the rods not only supplies current to run the loads, but also begins charging the dead battery.
Never reverse polariry!
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