When I was a field manager for AT&T, I would buy jump pacs to jump our vans. We had GPS built in and they were active 24/7, and on long weekends the battery would die. Any how, EVERY TIME the first time one was used, the dumb asses would hook it up backwards, of course it would blow the fuse of blow the pac. EVERY TIME!! And these were telephone technicians. Supposed to be smart:BangHead::BangHead: