I use both BatteryMINDers and CTEKs, and I think most or all of my car batteries are dry-cell types now. I just leave them plugged in.

i can kill any battery by neglecting it for too long. Haven't had much luck bringing them back, though, even with fancy Schumacher and Optima chargers.

When I need to jump start something I haul out the old Sears buzz box....