I awoke the Sears LT4000 from it slumber yesterday! Had to charge the battery some. When I finished, I parked it close to the shop for the Spring oil change! Started fine to warm the engine oil for draining. Afterwards, no go. Hooked the charger back up and pulled the cell covers. AHA! The negative end cell was not bubbling. Got the cell tester out and wouldn't float any of the little balls. Wanna be that way! Turned the charger up to a 40A charge. This is a 360 amp hour GT battery. All cells bubbled except the one on the negative end. HMMMMMMMM? What the heck, it's either gonna charge or blow! Switched it to a 200 amp start cycle. A few bubbles appeared. Switched back to 40A and no bubbles. Okay, if that's how you wanna be, 200A for 20-25 minutes. Bubbles galore, we be charging! Got the cell tester out and 2 were full charge, other 4 at 3/4 or less. Switched back to 40A and still had bubbles in the - end. Left it there for the afternoon. Checked the cells again and had all 6 at full charge. Dropped the charger to 2A for another hour and called it good. We'll see how it does from here.