Can I just use jumper cables instead of buying a jump starter?

A dedicated set of bare jumper cables, tested here as a cheap alternative connected to a separately owned power tool battery, failed to produce enough current to start even a V6 engine on its first attempt in this test. A real jump starter with its own internal battery is a meaningfully different product from a bare set of cables.

Is the most expensive jump starter always the best?

Not automatically, but in this test the most expensive unit, NOCO at 370 dollars, did finish with the best overall average result and was specifically recommended for diesel engines. The Milwaukee Hot Shot, at 300 dollars, was the second most expensive unit tested and underperformed several cheaper competitors, so price alone was not a reliable predictor.

Do I need a jump starter with a built-in tire inflator?

Only if you specifically want a two-in-one tool. In this test, Yaber Auto won the tire-inflator category outright and performed well generally, making it a strong pick if that convenience matters to you. NOCO and GooLoo, the top two overall finishers, do not include a built-in inflator.

How much battery bank capacity do I actually need from a jump starter?

This test measured battery bank capacity as a phone charger in peak watts and total watt hours, and found real gaps between advertised and actual capacity across several brands. If using the unit as a backup phone charger matters to you, look specifically for tested capacity figures rather than the manufacturer's advertised rating alone.

What is a super capacitor jump starter, and is it better than a battery-based one?

A super capacitor design, like the Milwaukee Hot Shot in this test, stores energy differently than a lithium battery pack and needs to be pre-charged from a separate power source (in this case, an 18V tool battery) before use. In this specific test, that design underperformed several battery-based competitors on starting power and could not start a diesel engine at all, so it is not automatically an upgrade over a standard lithium jump starter.

Did Which Brand Wins run these jump starter tests?

No. Every measurement in this guide comes from Project Farm's independent hands-on testing. We index the results, summarize what they mean for a buyer, and link straight to the source so you can watch the full test yourself.

Best Portable Jump Starter: 13 Tested for Real

A dead battery is never convenient, and the portable jump starter aisle does not make the decision any easier. Every box promises thousands of peak amps, a built-in tire inflator, and enough battery bank capacity to charge your phone a dozen times over, all for anywhere from 50 to 370 dollars. None of that tells you which one will actually turn over a cold engine when you need it to.

So a hands-on tester bought 13 different jump starters, from budget no-name brands to NOCO's flagship, and ran them through dead V6 starts, big block V8 turnover, diesel cold starts, and a bench cranking test. One product in the lineup did not even survive the very first test.

Here is what actually happened.

What the testing showed

Every result below comes from Project Farm's independent hands-on comparison. You can watch the full breakdown on the complete jump starter showdown, which puts 13 units through a genuinely tough gauntlet.

The lineup went through a cold start on a completely dead V6 battery, tire inflation speed and accuracy (for units with a built-in compressor), three back-to-back starts on a partially charged small block 350 V8, a big block 454 V8 turnover test on a very weak battery, a diesel engine start with two fully charged batteries, LED work light brightness, battery bank capacity as a phone charger, and a bench cranking amps test on a carbon pile tester.

NOCO held the top spot even after two years of real-world use

The NOCO GBX155, at around 370 dollars, was a unit the tester had already owned for about two years, included specifically to see how it held up against brand-new competition. His verdict: "The Noco came out on top with the best average finish of 1.6," and he called it "still performs as good as new." It was also the tester's specific recommendation if a diesel engine needs to be started, though it lacks a built-in tire inflator, a real gap for buyers who want an all-in-one tool.

GooLoo delivered the best value in the lineup

GooLoo, at about 99 dollars, finished as runner-up overall with an average finish of 2.5. The tester's explicit take: "a great value" for buyers who do not specifically need diesel-engine capability or a built-in tire inflator. That price point, less than a third of the NOCO's cost, for a genuinely strong second-place result is the clearest budget signal in the whole test.

Yaber Auto won the tire-inflator category outright

For anyone who wants the two-in-one convenience of a jump starter and an air compressor, Yaber Auto, at around 81 dollars, was the standout: "It ran circles around the competition. It has by far the fastest tire inflator and it also performed very well in all testing." If a built-in compressor is a priority, this was the clear pick in the lineup.

A capacitor-based design and a cable-only setup both showed real weaknesses

Milwaukee's Hot Shot, at 300 dollars (plus the cost of a separately sold 18V Milwaukee battery), uses a super capacitor design that needs about a minute to charge from a Milwaukee battery before it can jump a vehicle. Despite the highest price and the brightest work light in the test, it underperformed most cheaper brands on actual starting power and could not start the diesel engine at all.

The test also included a bare set of 8-gauge jumper cables designed to plug into a separately owned DeWalt power tool battery, priced at just 18 dollars, framed by the video itself as a thought experiment answering "why buy an expensive jump starter when you can just buy the set of cables." That product failed its very first test, unable to produce enough current to spin over the V6 engine at all, and it did not reappear in any later test in the video.

How to read this for your own purchase

This test makes the buying decision more about matching features to your actual driving situation than chasing a single winner. NOCO's top finish came with a real gap (no built-in inflator), and GooLoo's strong value finish came without diesel capability, so the "best" unit really depends on what you drive and what you already carry in the trunk.

If you drive anything with a diesel engine, the tested data points to NOCO, which was the only unit specifically recommended for that use case, while a capacitor-based unit like the Milwaukee could not start the diesel at all in this test.

If you want maximum value and do not need diesel capability, GooLoo's runner-up finish at under 100 dollars is hard to argue with.

If you want a single tool that also handles a flat tire, Yaber Auto's outright win in the tire-inflator category makes it the strongest all-in-one pick in this lineup.

A few universal rules the testing backs up:

A bare set of jumper cables is not a substitute for a real jump starter. The cheap cable-and-power-tool-battery setup in this test failed the very first cold-start attempt.
Battery bank capacity varies more than the peak amp claim suggests. Several units delivered far less real capacity than advertised when tested as a phone charger, so do not assume the marketing number is the real one.
A built-in tire inflator is a genuine convenience feature, but it is not universal across brands, so check for it specifically if you want a true all-in-one unit.

Want to compare the rest of the gear that gets a dead car moving again? Browse the jump starters and car power tests for chargers, testers, and more head-to-head jump starter breakdowns.