My buddy has a batteryminder 12248, and I would borrow it when I was noticing capacity loss.
This was back in Analog TV days and it would add some diagonal lines to the TV, which would move from the left to the right, and then stop and then go right to left. Turn off charger, no more diagonal lines. Other chargers the diagonal lines were almost always the same
I would leave it on the battery for 10 days, and then after one more discharge, I'd decide it was time for new batteries.
It always seemed to revert to the Gel setting after a period of time.
Worked oK as a converter when there were minor DC loads.
But 8 amps ain't jack.
