Stop in for a cup of coffee

So what is taking out the fuse? Place I worked a while back, we had a chair lift on stairway with gelcels. Always on trickle charge when parked. Was rarely used. Killed batteries in about a year if we didn't manually turn power off/on. If we didn't change them (no indicator to tell you either) and it tried to run on dying battery - it took out the control board. You think batteries are expensive? :BangHead:
my other BIL has been dicking around trying to diagnose what was/is wrong with it - after a month he decided the batteries were no good.. not taking a charge... I'm betting he did something trying to make it work that popped the fuse. Weird thing is, it was one of the first things I looked at and I swear it was good when I looked... I suppose I could have missed it