Nice little charger but their quality control leaves something to be desired. You reversed the wires from the SAE connector to the alligator clips, so you need to attach the black clip to the positive (red) battery post and the red clip to the negative (black) battery post. Then it works fine. Strangely, the wires for the ring terminals weren't swapped. All the manufacturer had to do was look at it and realize it wasn't properly connected. But they didn't seem to be watching. UPDATE November 2, 2021: Well apparently someone read this review because the seller sent me a new wiring harness that was wired correctly (I didn't ask him for it) and was independent of my revision. Review. So I would recommend this charger if its specs meet your needs. you made mine
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