So I have the DBPOWER 600a battery pack/jump starter. I carry this in my car, and it works great. Haven't used it on the bike but taking it with on my Blue Ridge Parkway trip in a few weeks:

Name:  Screen Shot 2019-09-29 at 10.52.12 AM.png
Views: 131
Size:  295.9 KB

Anyone else using this? Any thoughts? FAR cheaper than the AntiGravity battery pack IMHO!