Best Portable Jump Starter (2026): 7 Picks Ranked by Independent Tests

The best portable jump starter for most drivers is a small lithium pack sized to your engine, kept charged, with spark-proof and reverse-polarity protection. We didn’t test these ourselves. We read the hands-on results from Car and Driver, TechGearLab, Popular Mechanics, Outdoor Life and The Drive, then checked each maker’s page for price and specs on November 4, 2026.

Quick answer: for a car or small SUV, get the NOCO Boost Plus GB40 ($99.95), named a top pick by five outlets. For trucks and big engines, the Gooloo GT6000 ($139.99). For the biggest battery for the money, the WOLFBOX MegaVolt24 ($178). We found no independent test of Fanttik’s Potent T10.

Comparison: price, power and tested results

Jump starter	Price (Nov 4, 2026)	Peak amps	Engine rating (gas / diesel)	Battery	USB charging	Safety features	Weight	Tested result
NOCO Boost Plus GB40	$99.95	1,000A	6.0L / 3.0L	24Wh (TechGearLab measured 15.57Wh)	USB-C in, USB-A out (2.1A)	Spark-proof, reverse polarity, IP65	2.45 lb	Started a 4.0L V6 with a fully dead battery three times in a row (TechGearLab)
Gooloo GT6000	$139.99 (list $239.99)	6,000A	All 12V gas / 12.0L	27,000mAh	100W USB-C PD, 3 USB ports, 15V DC	10-layer protection incl. spark-proof, reverse polarity	4.44 lb	Started Car and Driver’s test car in Boost mode
WOLFBOX MegaVolt24	$178.00	4,000A	10L / 10L (TechGearLab)	24,000mAh; measured 82.3Wh of 88.8Wh (TechGearLab)	65W USB-C PD in/out	IP64 (TechGearLab)	Not listed	Started a V6 with a dead battery three times, 3% of charge each (TechGearLab)
Hulkman Alpha 85	$199.99	2,000A	8.5L / 6.0L	20,000mAh (Outdoor Life)	65W USB-C PD, USB-A QC3.0, 15V DC	10 protections incl. spark-proof, reverse polarity, IP65	Not listed	Outdoor Life’s Best Portable Jump Starter
NOCO Boost X GBX155	$369.95	4,250A	10.0L / 8.0L	99Wh (TechGearLab measured 86.1Wh)	60W USB-C PD in/out, USB-A	Spark-proof, reverse polarity, IP65	5.82 lb	Top score, 86/100 (TechGearLab)
Clore Jump-N-Carry JNC325	Not listed by Clore	Clore rates it 450 start assist amps	8L / 6L	Lithium (capacity not listed)	2 USB-A out, USB-C charging, 10A DC	Reverse polarity, backfeed, overheat; conforms to UL 2743	4.3 lb	Needed override, then started the car “with ease” (Car and Driver)
Fanttik Potent T10	$99.99 (list $139.99)	1,800A	7.0L / 5.0L	12,000mAh (44.4Wh)	30W USB-C PD in/out	Spark-proof, reverse polarity (Fanttik claims)	1.34 lb	No independent test found

Maker prices on November 4, 2026, before coupon codes. Specs are the maker’s unless a tester is named.

Best for most cars: NOCO Boost Plus GB40

In the roundups we read, no jump starter earned more awards. Car and Driver named it Most Compact, TechGearLab Best Compact, Outdoor Life Best All Weather, Popular Mechanics Most Waterproof, and The Drive Best Overall (its team owns and uses one). TechGearLab says it “easily jump-started a 4-liter V-6 gas engine with a completely dead battery three times in quick succession” in 33-degree weather.

The weak spot is capacity. TechGearLab measured 15.57Wh of NOCO’s claimed 24Wh, and in Car and Driver’s test one jump on a severely drained battery took it “from full to just 25 percent.” Car and Driver wouldn’t bank on “more than one or two jumps per charge.”

• Pros: small (2.45 lb); IP65; excellent clamps per TechGearLab; manual override for batteries below 2 volts; $99.95 from NOCO.
• Cons: small battery; short cables (6 inches, per Outdoor Life); NOCO rates it only to 6.0L gas and 3.0L diesel; 1-year warranty.

See the NOCO GB40 (we don’t earn a commission from NOCO) →

Best for trucks on a budget: Gooloo GT6000

Car and Driver named the GT6000 its Best for Large Engines: “It was able to start our vehicle using the Boost mode,” and it liked the large clamps for gloved hands. Popular Mechanics made it Best Overall for “maximum instantaneous power, long standby time, quick recharging, and plenty of output ports.” Gooloo rates it for all 12V gas engines and diesels up to 12.0L, with a 27,000mAh battery, 100W USB-C charging (0 to 100% in 1.4 hours) and 24-month standby.

• Pros: two outlets’ top picks; strong power bank; $139.99 on Gooloo’s store (list $239.99); up to 30-month warranty per Gooloo.
• Cons: 4.44 lb; Car and Driver says it “probably won’t fit in your glovebox”; its screen “is difficult to read when it catches the light wrong.”

See the Gooloo GT6000 (we don’t earn a commission from Gooloo) →

Most battery for the money: WOLFBOX MegaVolt24

TechGearLab bought 13 jump starters and named the MegaVolt24 its Best Overall. It started a V6 “with a completely dead battery three times in a row,” using 3% of its charge each time, and delivered 82.3Wh of its claimed 88.8Wh in a drain test (93%). WOLFBOX lists it at $178 with 4,000 peak amps, a 24,000mAh battery and 65W USB-C in and out.

• Pros: large, honest battery; fast USB-C charging; big display; hard storage case.
• Cons: TechGearLab found the clamps “stubby” and the flashlight mediocre; overkill for a small car.

See the WOLFBOX MegaVolt24 (we don’t earn a commission from WOLFBOX) →

Easiest to use: Hulkman Alpha 85

Outdoor Life named the Alpha 85 its Best Portable Jump Starter, “the Goldilocks option,” noting that industry pros it spoke to “frequently pointed to the Alpha 85 as an easy recommendation.” Hulkman rates it at 2,000 peak amps for 8.5L gas and 6.0L diesel engines, with a 3.3-inch display, IP65 housing and 65W charging. TechGearLab tested the pricier cold-weather Alpha 85S ($299.99, 80/100) and praised its “monster green ‘READY’ status indicator.”

• Pros: clear screen tells you when to crank; handles pickups; doubles as a power bank.
• Cons: $199.99 is more than the GB40 or GT6000; Hulkman’s product page doesn’t list the weight.

See the Hulkman Alpha 85 (we don’t earn a commission from Hulkman) →

Best for big diesels: NOCO Boost X GBX155

The GBX155 scored highest (86/100) in TechGearLab’s test, which called it “a beast” that made a V6 start “faster than when it starts with a perfectly good battery installed.” Popular Mechanics named it Best for Big Engines. NOCO rates it for 10.0L gas and 8.0L diesel, with a 99Wh battery (TechGearLab measured 86.1Wh) and 60W USB-C.

• Pros: the most proven heavy hitter; long cables and great clamps; IP65.
• Cons: $369.95; 5.82 lb; no hard case; Popular Mechanics found its manual override more complicated to use.

See the NOCO GBX155 (we don’t earn a commission from NOCO) →

Best for the garage: Clore Jump-N-Carry JNC325

Car and Driver picked the lithium JNC325 as its Best Overall for its 24-inch cables and ease of use; in its test it “did need to press the override button” and then started the vehicle “with ease.” Clore rates it for 8L gas and 6L diesel and its page is the only maker page we saved that states UL 2743 compliance. Clore doesn’t list prices, so check a dealer. For a shop that wants old-school lead-acid, Clore’s JNC660 (18 lb, 425 cranking amps) is Outdoor Life’s Best for Pros.

See the Clore JNC325 (we don’t earn a commission from Clore) →

Value add-on: Fanttik Potent T10 (untested)

The honest version: we found no independent test of any Fanttik jump starter. It isn’t in the Car and Driver, TechGearLab, Popular Mechanics, Outdoor Life or The Drive roundups. On paper it’s strong for $99.99: 1,800 peak amps, 7.0L gas and 5.0L diesel ratings, a 44.4Wh battery, 30W USB-C and 1.34 lb. All of that is Fanttik’s claim.

Where it makes sense is a bundle. Fanttik’s X8 APEX tire inflator won awards from GearJunkie and Outdoor Life (see our best portable tire inflator guide), and the X8 APEX plus T10 bundle costs $179.98, $10 less than buying both. Watch the cold rating: Fanttik rates the T10 for 5°F to 113°F. Our Fanttik review has more.

See the Fanttik Potent T10 →

See the X8 APEX + Potent T10 bundle →

How to choose a portable jump starter

Peak amps vs real cranking power

Car and Driver says lead-acid packs report cranking amps over 30 seconds, but lithium packs give high current for only two to five seconds. Clore publishes 425 cranking amps for the lead-acid JNC660 next to its 1,700 peak amps. Even Fanttik’s own support blog says a unit rated for 2,000 peak amps “might only deliver 800 sustained amps” at -20°F.

Engine size

Match the maker’s gas and diesel rating to your engine, then size up. Outdoor Life says ratings assume ideal conditions and that big gas or diesel engines should “size up” for cold weather. Diesel ratings run lower: NOCO rates the GB40 for 6.0L gas but only 3.0L diesel.

Cold weather

NOCO says the GB40 works from -20°C to 50°C (-4°F to 122°F) and warns: “Do not jump start a frozen battery.” Fanttik rates the T10 only down to 5°F. Fanttik’s own support blog says storing a jump starter “in the trunk or the glovebox is a mistake in extreme cold” and advises keeping it in the cabin.

Lithium vs lead-acid

TechGearLab found lead-acid packs better for long, hard cranking but heavy (over 15 lb) and in need of a recharge after each jump; lithium packs are light and can jump several times in a row.

Storage and recharging

Car and Driver advises recharging “every six months or so.” NOCO says an unused unit “will discharge and must be recharged before use,” and to avoid leaving it on the charger for more than a week. NOCO’s storage range is -20°C to 50°C, ideally 0°C to 25°C (32°F to 77°F) on average.

Clamps and safety features

Look for spark-proof and reverse-polarity protection. TechGearLab rated NOCO’s clamps the best. Boost or override modes help with very dead batteries, but NOCO warns override “disables safety protection.”

Using it as a power bank

For phones and laptops, look for USB-C PD: TechGearLab lists 65W max USB output for the WOLFBOX and the Hulkman Alpha 85S, 60W for the GBX155, and only 10W for the GB40. For real backup power, see our best portable power stations.

How to use a jump starter safely

These steps come from NOCO’s GB40 user guide. Your model’s manual comes first.

1. Charge it before you need it. NOCO says the GB40 ships partially charged and “needs to be fully charged prior to use.”
2. Check the battery. Read your car’s manual and confirm a 12-volt lead-acid battery. NOCO says never jump a frozen battery; Outdoor Life adds don’t jump a leaking one.
3. Gear up. Wear eye protection and remove metal jewelry and watches.
4. Turn everything off. Headlights, radio and air conditioning off.
5. Red, then black. Red clamp to the positive (+) terminal, black clamp to the negative (-) terminal or the chassis. Never to fuel lines or thin sheet metal.
6. Power on and wait for the ready light. A red error light on the GB40 means the clamps are reversed.
7. Start the car. If it doesn’t start, wait 20 to 30 seconds. NOCO says no more than five attempts in 15 minutes, then let the pack rest 15 minutes.
8. Disconnect in reverse, negative clamp first.
9. Then charge the car’s battery. Car and Driver suggests driving 15 to 30 minutes or putting it on a charger.

If your battery dies because the car sits, a maintainer fixes the cause: see our Battery Tender review.

Recalls and safety warnings

Searching the CPSC recall database by brand turned up no recalls for NOCO, Gooloo, WOLFBOX, Hulkman, Clore or Fanttik. In September 2026 the CPSC warned consumers to stop using Hererod PW40 and EW40 jump starters because their lithium-ion batteries “can explode and ignite,” after 16 fire reports. The maker didn’t respond to CPSC’s recall requests.

FAQ

What is the best portable jump starter?

For most cars, the NOCO Boost Plus GB40: Car and Driver, TechGearLab, Outdoor Life, Popular Mechanics and The Drive all named it a top pick. For trucks, the Gooloo GT6000, and for the most battery, the WOLFBOX MegaVolt24, TechGearLab’s Best Overall.

What is the best jump starter for a car?

For a sedan or small SUV, a compact lithium pack rated for your engine is enough. The NOCO GB40 is rated for 6.0L gas and 3.0L diesel engines, and TechGearLab used it to start a 4.0L V6 with a fully dead battery three times in a row.

How many peak amps do I need?

There’s no industry standard for peak amps, so use the maker’s engine size rating instead, and size up for cold weather or diesels. Popular Mechanics says 400 to 600 amps covers most cars, and 1,500 to 2,000 for large trucks.

How often should I recharge a portable jump starter?

Car and Driver suggests every six months or so, and NOCO says an unused unit will discharge and must be recharged before use. Check the charge level every few months and top it up before winter.

Can I leave a jump starter in my car in winter?

Yes, but cold cuts its power. NOCO rates the GB40 down to -4°F and Fanttik rates the Potent T10 to 5°F. In a deep freeze, keep it in the cabin or bring it inside, and never jump-start a frozen battery.

Has anyone tested the Fanttik Potent T10?

We found no independent test. It isn’t in the Car and Driver, TechGearLab, Popular Mechanics, Outdoor Life or The Drive roundups we read, so its 1,800 peak amps and 7.0L rating are Fanttik’s claims.

Related reviews

• Fanttik review: good tire inflators, untested jump starters
• Best portable tire inflator (2026)
• Battery Tender review

Sources

• Car and Driver: best portable jump-starters, tested (May 2026)
• Car and Driver: Clore JNC325 (Feb 2026)
• TechGearLab: best jump starters, 13 tested (Apr 2026)
• Popular Mechanics: best portable jump starters (Oct 2026)
• Outdoor Life: best portable jump starters (May 2025)
• The Drive: best jump starters (Feb 2025)
• NOCO GB40 (official)
• NOCO GB40 specs
• NOCO GB40 user guide (PDF)
• NOCO GBX155 (official)
• NOCO GBX155 specs
• Gooloo GT6000 (official)
• WOLFBOX MegaVolt24 (official)
• Hulkman Alpha 85 (official)
• Hulkman Alpha 85S (official)
• Clore JNC325 (official)
• Clore JNC660 (official)
• Fanttik Potent T10 (official)
• Fanttik X8 APEX + Potent T10 bundle (official)
• Fanttik: jump starter cold charging
• CPSC: Hererod jump starter warning (Sept 2026)
• CPSC recalls API search