Jump and Carry
JNC 660
Model: JNC660
Winner
Reference standard for old school jump packs. Best for older vehicles that don't want to start quickly. Best performer in cold weather with only -18% peak watts reduction. Delivers 17.2 watt hours consistently.
View on AmazonReviews (1)
Do New Lithium Jump Packs Beat Old School?
Torque Test Channel
Dec 19, 2025
Winner
Ranked #3
4.5
"Best for Older Vehicles - Reference standard for old school jump packs. Best for older vehicles that don't want to start quickly. Best performer in cold weather with only -18% peak watts reduction. Delivers 17.2 watt hours consistently."