Best jump starter for contractor work trucks: gas and diesel

A truck full of tools is no use when it won’t leave the driveway. Put a jump starter in the cab that matches the engine under the hood—not the biggest amp number on the box.

For a 6.7L diesel, start with NOCO GB150 or GOOLOO GP4000. For a smaller gas van, GB40 is much easier to tuck away. Keep a Clore JNC660 near the shop charger when you want a substantial booster with long cables and industrial clamps.

Quick picks for the truck

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• Best for diesel work trucks: NOCO GB150. Its maker rating covers up to 7.0L diesel and 9.0L gas engines. That puts a 6.7L diesel inside the published size limit.
• Best compact for vans: NOCO GB40. A 2.45lb unit rated for up to 6.0L gas or 3.0L diesel, with USB-C recharging on the current model.
• Best pro booster pack: Clore Jump-N-Carry JNC660. A sealed lead-acid workhorse with 425 cranking amps, 46-inch #2 AWG leads and industrial-grade clamps.
• Best budget diesel pick: GOOLOO GP4000. The maker rates it for gas and diesel engines up to 10.0L. Its regular maker price is below GB150’s, with both rated above 6.7L diesel.
• Gas work-truck pick: NOCO GB70. Up to 8.0L gas or 6.0L diesel. A useful step above GB40 for a large gas engine, rather than the pick for a 6.7L diesel.

Match the engine before comparing the amps

An F-250/Ram 2500-class badge doesn’t choose the pack for you. Read the engine displacement and the vehicle’s starting-system requirements. If yours is a 6.7L diesel with a 12V starting system, the published diesel limits put GB150 and GP4000 on this shortlist; GB70’s 6.0L diesel rating does not reach it.

Model	Maker gas / diesel engine rating	Published current	Recharge connection
NOCO GB40	Up to 6.0L / 3.0L	1,000A peak	USB-C, 5V/2.1A input
NOCO GB70	Up to 8.0L / 6.0L	2,000A peak	USB-C, 5V/2.1A; 12V XGC input also listed
NOCO GB150	Up to 9.0L / 7.0L	3,000A peak	USB-C, 5V/2.1A; 12V XGC input also listed
GOOLOO GP4000	Up to 10.0L / 10.0L	4,000A peak; manual also lists 800A starting current	USB-C, 15W input/output per manual
Clore JNC660	No engine-liter rating on the reviewed maker page	1,700A peak / 425A cranking	Built-in automatic AC charger; no USB-C

The current engine and port figures are published in NOCO’s GB40, GB70 and GB150 specs, the GP4000 maker page and manual, and Clore’s JNC660 specifications.

Peak amps are the marketing headline, not cranking amps. Clore explains that peak amps have no industry-agreed definition, while cranking amps measure delivery over 30 seconds at 32°F. GP4000’s 800A “starting current” is not labeled as that same cranking test. Don’t turn 4,000 versus 3,000 into a performance league table; use the maker’s engine rating for fit and the cable, battery and recharge setup for the working day (Clore’s rating explainer).

NOCO GB150: the diesel work-truck pick

Why you’ll like it: GB150 is the straightforward NOCO choice here for a 6.7L diesel. Its 7.0L diesel ceiling leaves that engine inside the published range, while the 9.0L gas rating also suits a large gas-engine shortlist. The 88Wh lithium-ion battery, heavy-duty clamps and rubberized IP65 enclosure make it a substantial truck kit without the JNC660’s bulk.

NOCO lists the unit at 6.39lb, spark-proof technology and reverse-polarity protection. The current specification lists USB-C input plus a 12V XGC charging input; the latter is the useful alternative to a slow USB refill (GB150 specifications; maker overview).

Good to know: IP65 is specified with the ports closed; keep the covers shut when the pack is stowed.

NOCO GB40: the compact van pick

Why you’ll like it: GB40 is the easy one to give each driver when the engines fit. At 2.45lb with a listed 7.72-inch length, it takes less room than the larger boosters. Its 24Wh lithium-ion battery and supplied heavy-duty clamps are aimed at up to 6.0L gas and 3.0L diesel engines.

The current model uses USB-C input at 5V/2.1A and has a separate USB output for small devices. Spark-proof technology and reverse-polarity protection are listed features, just as on the larger NOCO picks (GB40 specs; maker overview).

Good to know: A compact pack for a gas van is not the diesel pickup pack—its published diesel limit is 3.0L.

Clore JNC660: the shop’s pro booster pack

Why you’ll like it: Long leads and substantial clamps are the attraction. JNC660 puts 46-inch #2 AWG welding cable leads and industrial-grade clamps around a sealed lead-acid battery. The built-in automatic charger and voltmeter suit a pack that lives near a shop socket and goes out when a vehicle needs help.

Clore publishes 425 cranking amps, alongside the 1,700A peak figure, and an 18lb weight. This is the grab-handle workshop option, not the small pack for every glovebox (JNC660 maker specifications; operator’s manual).

Good to know: Choose the shop pack by Clore’s published cranking rating; the engine-rated picks above give a clearer 6.7L diesel shortlist.

GOOLOO GP4000: the budget diesel pick

Why you’ll like it: GP4000 puts a published 10.0L gas/diesel rating in a portable 820g lithium-polymer pack. Its manual lists smart jumper cables, dual USB outputs and a 15W USB-C input/output, so it also handles a modest phone top-up. The maker describes all-metal clamps with short-circuit, reverse-polarity and temperature protection.

Budget here means the lower regular maker price of our two engine-rated 6.7L diesel picks: on 2026-10-23, GOOLOO’s GP4000 page showed a regular/compare-at $189.99, while NOCO’s GB150 page listed $299.95. GB40 costs less on NOCO’s page but has a much smaller diesel limit.

Good to know: The GP4000 manual rates USB-C at 15W; allow 6–8 hours for a refill with a 5V/3A supply.

NOCO GB70: a useful step up for gas trucks

Why you’ll like it: GB70 fills the gap between the compact van pack and the larger diesel choice. NOCO rates it for up to 8.0L gas engines, with a 56Wh lithium-ion battery and a unit weight of 4.18lb. Its 12V XGC output adds a socket-style accessory option, alongside USB output.

The current specification lists USB-C input, 12V XGC charging and heavy-duty clamps; the overview lists spark-proof technology and reverse-polarity protection (GB70 specs; maker overview).

Good to know: Its diesel ceiling stays at 6.0L. For a 6.7L diesel, move to the GB150 or GP4000 shortlist.

Winter storage: chemistry doesn’t cancel the weather

Lithium makes the carry kit lighter; lead-acid makes JNC660 a heavier shop tool. Neither chemistry earns a free pass to sit neglected in the truck through winter.

Pack	Maker temperature guidance	Practical storage routine
NOCO Boost models here	Operate/store at −4°F to 122°F; GB150 guide lists charging at 32°F to 104°F	Keep within storage limits and bring it into the charging range before refilling
GOOLOO GP4000	Maker lists operating/storage range −4°F to 140°F	Keep it out of a parked hot cab; use the manual’s recharge setup
Clore JNC660	Manual names room temperature, about 68°F, as ideal storage	Recharge after use and every three months when idle

NOCO says those storage/operating limits apply across Boost models (Boost support); its GB150 guide supplies the charging range. GOOLOO gives its range on the GP4000 page. Clore’s JNC660 manual covers storage and recharge intervals; its cold-weather Q&A recommends bringing a unit inside below −20°F and charging every 30 days during extended extreme cold.

Make the charge check part of the truck reset: tools back, paperwork filed, booster ready. Cold affects battery output, so a charged pack and the maker’s storage routine belong together.

Buy the starter for the engine, power the office separately

Follow the vehicle manual for jump-start connection points and procedure, and the jump starter’s instructions for its use.

Buy GB150 for the NOCO diesel slot, GB40 for smaller vans, JNC660 for the shop, or GP4000 for the lower-priced diesel choice above. GB70 earns its place when the gas engine outgrows GB40’s rating.

A booster starts the vehicle; our van-office power-station guide covers running a laptop, tablet and printer. Pair the truck kit with a dash cam and a GPS tracker if the business also needs incident footage and the vehicle’s location.

Keep the first appointment moving with the right portable tire inflator for work trucks: battery-platform top-ups or a sustained-duty kit for LT tires.