Michael McCulloch wrote in message . ..
Just a word of warning about the "Vector" brand jumpstart batteries.
The darn thing takes 2 or 3 days to develop a full charge and if you
let it sit a couple of weeks without use, then you have to charge it
again.

Either I got a defective battery or the thing is nearly useless since
it requires so much time to charge and then loses the charge so
rapidly in storage.
[...]

You must have one with a defective battery. I have 7 Vectors (among some
others) and the Vectors work very well and have for years.