Clore Automotive Jump-N-Carry JNC660

The JNC660 is a sealed lead-acid portable jump starter claiming 1,700 peak amps and 425 cranking amps, delivered through a 22Ah Clore PROFORMER SLA battery and a 46-inch #2 AWG welding cable rated to −40°C. The peak-amp label claim is not independently verified by third-party bench measurement — no Project Farm or equivalent test was found for this model. What is well-documented: the JNC660 is the de facto standard in US automotive repair shops and car dealerships, with community evidence from Bob Is The Oil Guy, Garage Journal, and Amazon verified-purchase reviews consistently reporting successful starts of V8 engines, diesel trucks, and farm equipment. Build longevity is exceptional — 5–15 year ownership is common in community data, with multiple 20-year ownership accounts on the Clore Automotive blog (manufacturer-published). Secondary features include a 12V DC accessory outlet and an analog voltmeter for charge-status indication. Maintenance charging every three months is required to prevent battery sulfation; units that are maintained properly last far longer than lithium alternatives in the same use category.

Best for drivers or shops that need to start large-displacement gas engines, diesel trucks, or heavy equipment — particularly in cold climates where lithium-ion jump starters lose capacity below freezing. The SLA design delivers high sustained current without the cold-temperature drop that affects lithium packs. Skip if portability matters: at 18 lbs, the JNC660 is significantly heavier than compact lithium alternatives, and the quarterly maintenance charging requirement makes it a poor fit for drivers who want to leave a jump starter in a glovebox and forget it. For compact sedan trunks and occasional use, a lighter lithium unit with less maintenance overhead is a better fit.

No third-party electrical safety certification was confirmed for this model — no UL Product iQ or ETL database entry was found as of 2026-05-13. No active CPSC recall exists. The sealed lead-acid battery carries a Prop 65 warning for lead and ABS housing materials for vinyl chloride, styrene, and acrylonitrile; normal external use as a jump starter does not create a direct exposure pathway. At end of life, sealed lead-acid batteries have near-universal US recycling infrastructure — auto parts stores and scrap yards accept SLA units; the manual explicitly states the battery must be recycled. No manufacturer take-back program for the electronics housing was documented.