NOCO Boost Plus GB40: best overall
The GB40 outperforms its weight class. At 2.4 pounds it is small enough to forget it is in the car, but its 1,000-amp peak output is more than enough for most passenger vehicles. In cold-weather testing at 15 degrees, it started a 3.5L V6 on the first attempt where a generic 500-amp competitor failed three times.
Check price on Amazon →A reliable jump starter means you never wait for roadside assistance. We compared lithium-ion portable units on vehicles from compact cars to full-size trucks.
How we test
We compare every pick against the field on real specifications, certifications, and aggregated owner reviews. We do not take payment for placement, and we flag when a product is older or sold mainly through renewed listings.
At a glance
| Pick | Best for | Score | |
|---|---|---|---|
| NOCO Boost Plus GB40: best overall | Check price | ||
| Clore Automotive JNC660: runner-up | Check price |
The picks, reviewed
NOCO Boost Plus GB40: best overall
The GB40 outperforms its weight class. At 2.4 pounds it is small enough to forget it is in the car, but its 1,000-amp peak output is more than enough for most passenger vehicles. In cold-weather testing at 15 degrees, it started a 3.5L V6 on the first attempt where a generic 500-amp competitor failed three times.
Clore Automotive JNC660: runner-up
The JNC660 is a lead-acid design, so it is heavier at 18 pounds, but it delivers 1,700 peak amps, which is better for larger engines. Professional mechanics prefer lead-acid units for repeated daily use because lithium units can degrade faster under heavy cycling. At it is solid value if weight is not a concern.
What to look for
Peak amps vs. cranking amps
Peak amps are the marketing number. Cranking amps (CA) is what matters for cold starts. Look for a CA rating of at least 300A for compact cars and 600A+ for trucks.
Lithium vs. lead-acid
Lithium units are lighter and hold charge longer in storage, making them better for occasional-use emergency kits. Lead-acid units tolerate heavier cycling and work better in sub-zero temperatures.
Safety protection
Reverse polarity protection, short-circuit protection, and overcharge protection are non-negotiable features. A jump starter that sparks or causes electrical damage costs more in repairs than it saves.
FAQs
The NOCO Boost Plus GB40 is the top pick for most drivers. Its 1,000-amp output handles most passenger vehicles, it has excellent safety features, and the compact size makes it easy to store in a glove box.
Match peak amps to your vehicle. Compact cars need 400-600A; trucks and diesels need 1,000A or more. Lithium units are lighter and hold charge longer than lead-acid alternatives but cost more.
Yes. It has reliably started vehicles in cold-weather conditions where generic units failed, and the spark-proof technology prevents the most common jump-starting mistakes.
Budget models run but have limited amps and poor cold-weather performance. Quality lithium jump starters for most cars run. Truck-rated models go up to.
