The Triton charger should have shown you the initial voltage before you charged it, so you should have been able to determine how low it got.

If you've already recharged it, I'd check the balance on the cells with a voltmeter. If your pack doesn't have individual cell taps, you'll have to cut the shrink wrap off of the pack to get at the PC board to probe them. If they are still balanced, then just cycle it a few times with the Triton, and note the capacity you get out of it. If it's close to the rated capacity, then I'd say use it.