I realized that leaving my LED lights or stereo running for less than a half hour was draining my battery. I checked and it was like 8 years old. I swapped it out with a new one and then ran this battery test. 24 hours and the voltage didn't drop more than a tenth or two of a volt. It used to drop a whole volt in an hour or so. I also tested my alternator just to make sure it was up to the task and it was strong as new.

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