9 times in 20 years. Usually it's someone less fortunate that can't afford to keep their vehicle maintenance up to date. I have 1 set, that is there to give away to someone in need. The other set is just in case I need a jump at some time & because I can't always afford to purchase a new set right away.
I have a set of these in my garage. I also have a set of these in my car. Why do I have two sets? When I encounter someone who needs a jump - I give them the set from my car. Then purchase new ones. Kindness is my Super Power.