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Quick answer: The NOCO GBX45 is the best all-around choice here for many 12-volt cars and midsize SUVs because it combines published limits of up to 6.5-liter gasoline and 4.0-liter diesel engines with 60-watt USB-C charging and a 2.16-pound body. Choose the NOCO GB40 for a simpler compact pack, the NOCO GB70 for larger documented engine limits, the Clore JNC660 for a serviceable garage-style lead-acid pack, or the Clore JNCAIR when an integrated air compressor and long cables justify substantial extra weight.
Compatibility comes first. Confirm your vehicle's voltage, fuel type, engine displacement, approved connection points, and jump-start procedure, then match them to the exact starter manual. Our jump-starter sizing guide explains the five checks. Peak-amp labels are not standardized enough to compare unrelated brands by themselves.
Decision table: match the starter to the vehicle and job
| Model | Best for | Published engine limit | Weight / charging | Support and parts path | Main limitation |
|---|---|---|---|---|---|
| NOCO GBX45 | Best overall and fastest recharge | Up to 6.5 L gas / 4.0 L diesel; 12 V lead-acid | 2.16 lb; up to 60 W USB-C input/output | GBC101 case and GBC011 12 V USB-C charger documented; internal pack is not presented as user-replaceable | Needs a compatible 60 W charger for the fastest recharge |
| NOCO GB40 | Compact everyday carry | Up to 6.0 L gas / 3.0 L diesel; 12 V lead-acid | 2.45 lb; USB-C input | GBC013 case and manufacturer support documented; internal pack is not presented as user-replaceable | Lower diesel limit and slower charging than GBX45 |
| NOCO GB70 | Larger gasoline and diesel engines | Up to 8.0 L gas / 6.0 L diesel; 12 V lead-acid | 4.18 lb; USB-C or 12 V XGC fast-charge input | GBC014 case and XGC accessories documented; internal pack is not presented as user-replaceable | Heavier and bulkier than compact packs |
| Clore JNC660 | Garage use and serviceability | No liter limit published on current product page; 12 V, 425 cranking amps | 18 lb; built-in automatic charger | JNC105 replacement battery documented for this model | Too heavy for most glove boxes; exposed clamps require careful handling |
| Clore JNCAIR | Jump starting plus tire inflation | No liter limit published on current product page; 12 V, 425 cranking amps | 28.5 lb; built-in automatic charger | JNC105 replacement battery documented; manufacturer support for other parts | Very heavy; compressor can thermally shut down during use |
Our five-check selection method
- Match the electrical system: Every pick here is for compatible 12-volt vehicle applications. Do not assume a hybrid, EV, 24-volt truck, or specialty vehicle follows the same procedure.
- Use the maker's engine limit: For NOCO models, match gasoline or diesel liters. Clore does not publish a universal engine-liter limit for the JNC660 or JNCAIR, so confirm suitability with the vehicle manual and Clore support rather than inventing one.
- Leave climate margin: Cold weather reduces available battery performance. A higher documented engine class can provide practical margin, but we did not measure cold-cranking performance and do not call any pack a universal cold-weather winner.
- Plan the recharge routine: A discharged jump pack cannot help. Choose USB-C speed for travel convenience or a built-in automatic charger for a garage unit you can keep maintained according to its manual.
- Check the ownership path: Verify the exact model, current manual, warranty, accessories, replacement parts, and CPSC recall status before purchase.
How we selected these models
We included only exact models with current manufacturer pages and useful first-party documentation. The five picks span two battery formats and distinct jobs: compact lithium storage, faster USB-C charging, larger published engine limits, serviceable lead-acid construction, and combined jump-start/inflation capability. We excluded marketplace-only models that lacked a dependable manual or manufacturer support path.
We also checked current CPSC material. On September 17, 2026, CPSC warned consumers to stop using the Hererod EW40 jump starter/power bank because its internal lithium-ion batteries can explode and ignite. That model is not recommended here. Recall status can change, so recheck the CPSC recall database by brand and model before first use.
NOCO GBX45 Boost X
NOCO rates the GBX45 at 1,250 peak amps for 12-volt lead-acid batteries, with published limits up to 6.5-liter gasoline and 4.0-liter diesel engines. Its 31-watt-hour lithium-ion pack weighs 2.16 pounds and supports USB-C Power Delivery input and output up to 60 watts. NOCO says a compatible 60-watt setup can fully recharge it in 48 minutes or provide enough charge for a jump-start attempt after five minutes; treat those as manufacturer claims, not our test results.
Why choose it: It has the broadest balance of engine coverage, low weight, and modern charging in this shortlist. Spark-proof design and reverse-polarity protection reduce common connection errors when used as directed. Know before buying: The 60-second power-conservation window changes the workflow, and the quickest recharge requires a separate compatible charger. NOCO documents the GBC101 fitted case and GBC011 vehicle charger; it does not present the internal lithium battery as a user-replaceable part.
Check the NOCO GBX45 on Amazon →NOCO GB40 Boost
The current GB40 is a 1,000-amp, 12-volt lithium jump starter rated for gasoline engines up to 6.0 liters and diesels up to 3.0 liters. NOCO lists a 24-watt-hour internal battery, 2.45-pound weight, IP65 enclosure rating, 100-lumen light, USB-C input, USB output, spark-proof design, and reverse-polarity protection.
Why choose it: It covers many common four- and six-cylinder gasoline vehicles without the cost or bulk of the larger GB70. Know before buying: Its diesel limit is materially lower than the GB70's, and charging is slower than the GBX45's 60-watt USB-C path. NOCO offers the model-specific GBC013 case and support documentation, but the internal lithium pack is not advertised as user-serviceable.
Check the NOCO GB40 on Amazon →NOCO GB70 Boost HD
NOCO rates the GB70 at 2,000 peak amps for 12-volt lead-acid batteries and publishes limits up to 8.0-liter gasoline and 6.0-liter diesel engines. The 56-watt-hour lithium pack weighs 4.18 pounds. It includes USB-C input, USB output, a 12-volt XGC input/output system, a 400-lumen light, IP65 protection, spark-proof operation, and reverse-polarity protection.
Why choose it: It is the appropriate step up among these lithium picks when the exact vehicle falls outside the smaller models' documented engine classes. The 12-volt output can also power compatible accessories within NOCO's limits. Know before buying: More published capacity brings more size and weight. NOCO documents the GBC014 fitted case and XGC accessories; internal-cell replacement is not a listed owner service.
Check the NOCO GB70 on Amazon →Clore Jump-N-Carry JNC660
Clore documents the JNC660 at 1,700 peak amps and 425 cranking amps, with a PROFORMER lead-acid battery, 46-inch #2 AWG cables, industrial-grade clamps, a built-in automatic charger, charge-status voltmeter, 12-volt accessory outlet, 18-pound weight, and one-year limited warranty.
Why choose it: The long cables, robust clamps, built-in charger, and documented JNC105 replacement battery make it better suited to a garage, fleet, or multi-vehicle household than a sealed lithium pack. Know before buying: It is heavy, lacks the connection protections emphasized on the NOCO models, and Clore does not publish a simple gasoline/diesel liter limit on the current product page. Confirm the vehicle application and exact connection sequence before use.
Check the Clore JNC660 on Amazon →Clore Jump-N-Carry JNCAIR
The JNCAIR pairs the same published 1,700 peak amps and 425 cranking amps with 68-inch #2 AWG cables, industrial Hot Jaw clamps, a built-in automatic charger, 12-volt outlet, and a 12-foot coiled air hose with screw-on chuck. It weighs 28.5 pounds. Its manual states that the compressor has overheating protection that can temporarily shut it down when the recommended operating temperature is exceeded.
Why choose it: One substantial garage unit can address both a discharged battery and a low tire, with enough hose and cable reach for awkward parking positions. Know before buying: It is by far the heaviest pick and not a glove-box tool. Inflation does not repair a puncture or replace a tire inspection. Clore documents the JNC105 replacement battery for the JNCAIR; contact manufacturer support for model-specific compressor, hose, clamp, or charger service.
Check the Clore JNCAIR on Amazon →Non-negotiable jump-start safety
- Read both the vehicle manual and the exact jump-starter manual before connecting anything. Use only the vehicle's approved points and sequence.
- Do not jump-start a battery that is frozen, swollen, leaking, cracked, badly damaged, or giving off an unusual odor. Move away and arrange qualified service.
- Work in a well-ventilated area, keep sparks and flames away, set the parking brake, and switch off vehicle accessories.
- Confirm voltage and polarity. Never allow clamps to touch each other, and keep cables clear of fans, belts, hot surfaces, and moving parts.
- Use manual override only when the manufacturer explicitly permits it and you understand which protections it bypasses.
- Stop after the manual's allowed crank time and attempt count. Repeated no-starts need diagnosis, not unlimited boosting.
- Recharge on the documented schedule, inspect the pack and cables before trips, and store within the manual's temperature range—not loose on a hot dashboard.
Which one should you buy?
- Choose GBX45 for a light, broadly compatible 12-volt travel pack with rapid USB-C charging.
- Choose GB40 when its lower published engine limits fit and compact simplicity matters most.
- Choose GB70 for larger compatible gasoline or diesel engines that exceed the smaller models' ratings.
- Choose JNC660 for garage use, long cables, built-in charging, and a documented replacement battery.
- Choose JNCAIR only when the integrated compressor and extra reach are worth a 28.5-pound unit.
If the exact vehicle manual does not authorize portable jump starting, or the product documentation does not clearly match voltage and application, none of these should be used. Call roadside assistance instead.
Primary sources
- NOCO GBX45 product documentation and technical specifications.
- NOCO GB40 product documentation and technical specifications.
- NOCO GB70 product documentation and technical specifications.
- Clore JNC660 specifications and manual.
- Clore JNCAIR specifications and manual.
- NHTSA winter-driving and emergency-kit guidance.
- U.S. CPSC recall database and September 17, 2026 Hererod EW40 safety warning.
Related guides
What size jump starter do you need? →
Best portable tire inflators for cars and SUVs →
Editorial note: Product facts come from current first-party documentation. Use-case labels are Crawford Select editorial judgments. We did not test starting performance, cold-cranking output, charging speed, clamp durability, or compressor performance. Submit corrections through the contact route on our About page.