“I’ve done roadside assistance for 5 years and have always used a JNC660. It’s a staple in jump starting devices, but it only gives you one or two jumps on larger engines and it’s so big and heavy. I’ve tried lithium ion jump packs a few times and they were always hit and miss and ended up having to use the JNC660 in the end.
About a year ago, I decided to get a JNC345 and it has been fantastic. It starts anything and only needs charged once a week, give or take. It has started a flat 5.9 Cummins like it was nothing and the same with a 6.0 power stroke. It has been a game changer for my business.