when replacing my battery, I hooked the positive cable first, when hooking up the ground cable there was a small spark, I shut off the master kill switch and hooked it on with no spark. I do have a radio and tape player that has memory so they are hot with ignition switch off, would that be the cause of the spark at the ground cable? I dont recall of this happening before. thanks
Yep, radio with a memory circut has a small draw. Will run down a battery over time without that disconnect switch.