Sorry, the battery is Exide deep cycle stow away 500 amps, 140 min reserve, 80 amp hrs part #24mdcst. The charger is a Schumacher SE 70ma manual/automatic 12v/24v. The directions for the charger stated that in automatic mode for deep cycle batteries it would charge the battery and once it reached its charge it would automatically switch to a maintenance/trickle charge. The charger has a regulator on it that indicated 75%. It would not go above 75% despite being on the charger for 2 or 3 days. I used the battery once and probably did drain it because I forgot about it still being hooked up. I just trying to figure out if I ruined it already because it won't charge to 100%. Thanks for the help.