Jump Starters

GOOLOO GT4000S

Name: GOOLOO GT4000S
Brand: GOOLOO

#3 · Best Value

7.3 /10 Our score

Lowest verified price $99.96 Amazon

Our verdict

A sensible budget pick for diesel pickups if you keep it topped up and warm. It trades documentation and certainty for price.

Pros

Very low price for 4,000A
Light at 2.3 lb
IP65
100W USB-C power delivery
Outdoor Life's pick for diesel trucks

Cons

Conflicting engine ratings on the maker's page
No Wh figure or certifications published
FAQ advises recharging every 3 months
Some owners report units that stopped charging

Disclosure: We may earn a commission when you purchase through links on this page. This does not affect our editorial rankings.

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Last reviewed October 27, 2026

Review

What to know about GOOLOO GT4000S

A 4,000A lithium-polymer pack with 100W USB-C PD and IP65. GOOLOO's page gives conflicting engine ratings (12L/10L and 10L/8L). Outdoor Life named it 'Best for Diesel Trucks' and Popular Science 'Best design'; no cold test exists. It is a budget pick at about $100.

Editorial notes

Why it stands out

Why we like it

Outdoor Life named it Best for Diesel Trucks, saying it has enough juice to turn even the biggest diesel engines in a 3/4 ton pickup. Popular Science picked it for best design. Neither ran a cold test, and Outdoor Life's test vehicles were an Escape and a 6.0L Yukon.

At around $100 with a 2.3 lb body, it is easy to keep in the cab where it stays warmer. GOOLOO's page lists both 12L gas/10L diesel and 10L/8L, so treat the diesel ceiling as 8 to 10L.

What to know

Skip it if you need documented cold performance or a published capacity. It is rated only to -4°F and no independent cold test exists.

Performance

Score breakdown

Starting Power

Ability to start a fully dead or deeply discharged battery on the intended engine size, including repeated back-to-back starts and cold-weather performance, as shown in independent tests (TechGearLab 3x rapid-start, Car and Driver dead-battery tests, Outdoor Life V8 tests).

7.5

4,000A; Outdoor Life recommends it for 3/4-ton diesels; diesel rating conflicts between 8L and 10L

Battery Capacity & Standby

Measured usable energy versus claimed, jumps per charge, standby charge retention and recharge speed.

6.0

No published or measured Wh; -4°F floor; 3-month top-up advised

Ease of Use & Safety Features

Clamp quality and size, cable length and gauge, clarity of the display and indicators, spark-proof and reverse-polarity protection, and how easy the boost/override mode is to use.

7.5

SuperSafe protections, PopSci's Best design, 2.3 lb

Build Quality & Durability

Construction, water and dust resistance (IP rating), quality of cables and clamps, storage case, and warranty length.

6.5

IP65; some anecdotal reports of units that stopped charging

Versatility

Extra functions such as USB-C PD power bank, 12V DC output, air compressor, work light and alternator check.

7.5

100W two-way USB-C PD

Battery Safety & Sustainability

Battery chemistry and fire risk, verified safety certification (UL 2743), CPSC recalls or warnings, Prop 65/lead content, replaceable batteries and parts, and end-of-life recyclability.

5.0

Li-polymer; no certifications named on the product page

Value

Performance and features delivered relative to typical street price.

8.8

About $100 for a diesel-capable pack recommended by independent outlets

Specifications

GOOLOO GT4000S specs

Power

Peak Current: 4000 A

Battery

Battery Chemistry: Lithium polymer

Physical

Weight: 2.3 lb
Water/Dust Rating: IP65

Features

Built-in Air Compressor: No
Max USB Output: 100 W

Cold Weather

Min Operating Temperature (rated): -4 °F
Automatic Cell Preheat for Extreme Cold: No

Shopping

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Disclosure: We may earn a commission when you purchase through links on this page. This does not affect our editorial rankings.

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Retailer	Price	Availability
AmazonLowest	$99.96 $139.99	In Stock	View deal

Lowest verified price $99.96

30-day low $99.96

90-day average $99.96

90-day low $99.96

Based on 2 retailer price observations captured during the last 90 days.

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