Best Portable Jump Starters Compared on Maker Specs (2026)
Three jump starters for US drivers, compared on the numbers each maker publishes. We have not tested these units ourselves.
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A portable jump starter lets you start a car with a flat battery without a second car. The NOCO GB40 suits most cars and fits in a glovebox, the NOCO GB70 covers big gas and diesel engines, and the Clore JNC660 is a heavy lead-acid pack with long cables.
Quick picks
- Best for most carsBoost Plus GB40Check price
- Best for big enginesBoost HD GB70Check price
- Best shop-style packJump-N-Carry JNC660Check price
Side-by-side specs
| Spec | Top pickNOCOBoost Plus GB40 | Big enginesNOCOBoost HD GB70 | Shop-styleClore AutomotiveJump-N-Carry JNC660 |
|---|---|---|---|
| Best for | Most cars, kept in the glovebox | Trucks, SUVs and larger engines | Shop-style use with long cables |
| Peak currenthigher is better | 1,000 A1000 A | 2,000 A★ Best2000 A | 1,700 A1700 A (425 cranking A) |
| Engine rating | Gas up to 6.0 L, diesel up to 3.0 L | Gas up to 8.0 L, diesel up to 6.0 L | Not listed |
| Battery | 24 Wh lithium-ion | 56 Wh lithium-ion | Sealed lead-acid (PROFORMER) |
| Weight | 2.45 lb (spec page); 2.4 lb with clamps (data sheet) | 4.18 lb | 18 lb |
| Warranty | 1 year | 1 year | 1 year limited |
| Price | Check price | Check price | Check price |
Specs from each manufacturer's US product page. Bars compare each spec against the best value in this table; they are not test scores. Prices change often, so we link out instead of quoting them.
The picks
★Best for most cars
NOCOBoost Plus GB40
Best for: Most cars, kept in the glovebox
A 1000 A peak lithium jump starter rated for gas engines up to 6.0 L and diesel up to 3.0 L, at 2.45 lb with USB charging out.
What we like
- Smallest and lightest here
- Charges a phone by USB
- Spark-proof, reverse-polarity protection (per NOCO)
Watch out for
- Lowest engine rating here
- 1-year warranty
The GB40 is rated at 1000 A peak and for gas engines up to 6.0 L and diesel up to 3.0 L. It holds a 24 Wh lithium battery, has a 100-lumen light and a 5 V, 2.1 A USB port, and carries an IP65 rating. NOCO’s spec page lists 7.72 x 3.16 x 1.71 in and 2.45 lb, while its data sheet lists 6.7 in long and 2.4 lb. Its data sheet also quotes up to 20 jump starts per charge.
★Best for big engines
NOCOBoost HD GB70
Best for: Trucks, SUVs and larger engines
A 2000 A peak lithium jump starter rated for gas engines up to 8.0 L and diesel up to 6.0 L, with a 56 Wh battery and 12 V output.
What we like
- Covers large gas and diesel engines
- 12 V output port
- 400-lumen light
Watch out for
- Heavier than the GB40
- 1-year warranty
The GB70 doubles the peak rating to 2000 A and extends coverage to gas engines up to 8.0 L and diesel up to 6.0 L. The battery grows to 56 Wh, the light to 400 lumens, and it adds a 12 V, 15 A output. NOCO lists 4.18 lb and an IP65 rating.
★Best shop-style pack
Clore AutomotiveJump-N-Carry JNC660
Best for: Shop-style use with long cables
A 1700 A peak, 425 cranking amp lead-acid jump pack with 46 in #2 AWG cables, a built-in automatic charger and a voltmeter.
What we like
- Only pick here with a cranking-amp rating
- Long 46 in heavy cables
- Built-in charger
Watch out for
- 18 lb
- No engine-size rating listed
Clore markets the JNC660 to garages, dealers and tow operators. It lists 1700 A peak and 425 cranking amps, 46 in #2 AWG cables, a built-in automatic charger and a voltmeter. At 18 lb it stays in the garage or a truck bed more than a glovebox.
How to choose
- Match the engine rating. Look up your engine size and fuel type, then pick a unit rated above it.
- Think about where it lives. A small lithium unit fits a glovebox. A lead-acid pack needs floor space.
- Keep it charged. Top it up on a schedule so it works when you need it.
- Follow your owner’s manual. Some vehicles name specific jump points under the hood.
Read next: how to use a jump starter and NOCO GB40 vs GB70.
Frequently asked questions
Is a higher peak amp number always better?
Not on its own. Peak amps is a short burst figure. NOCO also lists the engine sizes each unit is rated for, and Clore lists cranking amps. Match the rating to your engine.
What size jump starter do I need for a V8 truck?
NOCO rates the GB40 for gas engines up to 6.0 L and the GB70 for gas up to 8.0 L and diesel up to 6.0 L. Check your engine size in the owner's manual.
Lithium or lead-acid?
The two NOCO units are lithium and weigh 2.45 lb and 4.18 lb. The Clore JNC660 uses a sealed lead-acid battery and weighs 18 lb, with long 46 in cables and a built-in charger.
