When I say Trojan, batteries might not be the first thing that come to mind. Today I really scored. I went by our local golf course to see about any dead batteries they had from their golf carts. They had about six batteries, five of which I took home with me. After testing the units I realized that they were all too far gone to save. I stopped by a car repair shop to swap out dead battery cores. To my surprise they had three trojan T-105's on the floor all of which had a great voltage reading and no signs of sulfation. I swapped them cores and now have some high quality scrap batteries to play with.