Quick Comparison
| Product | Best For | Rating |
|---|---|---|
| NOCO Boost Plus GB40 | Best Overall | 4.7/5 |
| Clore Automotive JNC660 | Best for Trucks | 4.4/5 |
| NOCO Boost HD GB70 | Best Heavy-Duty | 4.6/5 |
Why you should trust this review
Jordan Blake has tested portable jump starters across multiple vehicle classes including compact cars, midsize SUVs, and 3/4-ton trucks. Testing included cold-soak conditions at 15 degrees Fahrenheit to evaluate real-world performance rather than peak-conditions spec-sheet numbers.
How we evaluated car jump starters
Each unit was tested against a fully discharged battery on three vehicle types. Starting success rate, time to first crank, and clamp connection ease were recorded. Charge retention was measured after 60 days of storage. Safety features were evaluated by intentionally attempting reversed-polarity connections.
Who should buy the NOCO Boost Plus GB40?
Drivers of passenger cars, crossovers, and light SUVs who want peace of mind for dead-battery situations should buy the GB40. It is compact enough to live in a glove box year-round and capable enough to start virtually any gas-powered vehicle under 6 liters. Those with large diesel trucks should step up to the GB70 or similar higher-amp unit.
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.
The spark-proof smart clamp technology is the safety feature that sets NOCO apart. When you connect the clamps in reverse order or to the wrong terminals, the unit simply does not activate instead of sparking and potentially damaging electronics. This alone justifies the premium price for anyone who has ever been nervous about jump-starting.
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. Atcurrent pricing it is solid value if weight is not a concern.
What to look for in car jump starters
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.
Frequently asked questions
What is the best car jump starter in 2026?+
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.
How do I choose a car jump starter?+
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.
Is the NOCO Boost Plus GB40 worth buying?+
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.
What should I expect to pay for a car jump starter?+
Budget models runcurrent pricing but have limited amps and poor cold-weather performance. Quality lithium jump starters for most cars runcurrent pricing. Truck-rated models go up tocurrent pricing.