[id10t]

Got battery for my trolling motor (100ah marine deep cycle)

Should get 3 hours run time on full charge. Ain't happening.

First 2 times I had it out, my cheapo ampmeter from amazon said it was 100% charged at rest and 90% under load when first launching, and was reasonable accurate based on run time vs. percent left claimed.

Last few trips out, with no load ampmeter is showing 85% after being on charge for 48 hours, and under load it immediately drops to 55%, which again seems to be accurate. Yesterday had it out, and when it was reporting 0% I was still moving but at about half max speed. Fortunately only a few hundred yards from boat ramp, and we returned under power with no paddling. But it was close.

So... I am about to go back to the FLAPS where I bought the thing, have them test it, and possibly get a new one (yay 1 year warranties). Should I charge it as much as I can first, or take it to them in its current "mostly dead" state?