Well, my daughter finally used the jump pack - to start a friend's car. Worked like a champ. This reminds me I need to get one for daughter #2, who's about to experience an Ohio winter.
Ive had a new EarthX 12/24v jump pack for about a week. 7.8ah vs 2.2ah in the old one. About 4x the weight and size, too, but for carrying into the boonies it’ll have lots more starts in it, not that the old ones have ever disappointed. Yes, you 28v guys now can buy a Jump Pack that works. EarthX also is making a 24v lightweight battery.