Portable Jump Starters · Rank #3 of 5
GOOLOO GT4000S — 4000A, 100W two-way
$79.99★4.6 (8,789 ratings)Fits: Universal
Best for
4000A peak covers large gas V8s and most diesels
Not for
Smaller 8,700-review base than the NOCO models
Key compromise
Larger and heavier than a pocket 1000A booster
Closest cheaper option
This is already the lowest-priced active pick.
Retailer price checked 2 days ago. As an Amazon Associate we earn from qualifying purchases.
81
Grade B+ · ranked #3 in category.
Scored on 6 public criteria, weighted 55% category-specific, 25% owner satisfaction, 20% value.
Scored on 6 public criteria, weighted 55% category-specific, 25% owner satisfaction, 20% value.
Cranking Power
89
Capacity & Charging
98
Safety Features
74
Build Quality
74
Value
77
Owner Satisfaction
80
Portable Jump Starters · Rank #3 of 5
GOOLOO GT4000S — 4000A, 100W two-way
$79.99★4.6 (8,789 ratings)Fits: Universal
OUR VERDICT
The most amps per dollar we found: 4000A and a ~99.9Wh pack for about a hundred bucks, with 100W two-way USB-C so it recharges fast and powers a laptop. Priced like a mid-range unit, spec'd like a premium one.
WHAT IT GETS RIGHT
4000A peak covers large gas V8s and most diesels
100W two-way USB-C PD recharges the pack and runs a laptop
~99.9Wh capacity is among the largest in this price band
KNOW BEFORE YOU BUY
Smaller 8,700-review base than the NOCO models
Larger and heavier than a pocket 1000A booster
Peak Amps
4000A
Capacity
~99.9Wh (26,400mAh)
USB Output
USB-C PD 100W (two-way)
Price checked Jul 10, 2026 · As an Amazon Associate we earn from qualifying purchases.
What buyers say
3,265 buyer mentionsBuyers praise functionality, quality, ease of use and value for money. Mixed feedback on battery life. Some flag durability.
↑ Functionality↑ Quality↑ Ease Of Use↑ Value for money↓ Durability↕ Battery Life
But if you’d rather…
…GET THE WINNER · Hulkman Alpha Pro — $119.99 · 83
Buy on AmazonThe value pick for people who want the pack to double as a phone/laptop bank: 1500A of starting power plus a 65W USB-C PD port that charges in and out. Full-color display shows exact charge and boost status instead of guessing at LED bars.
…SPEND MORE (+$120) · NOCO Boost GB40 — $199.95 · 82
Buy on AmazonThe glovebox standard for regular cars: 1000A is plenty for 4- and 6-cylinder gas engines, with the same spark-proof clamps as the pricier NOCO units. Skip it only if you run a large V8 or diesel that wants more amps.
As an Amazon Associate we earn from qualifying purchases.