GOOLOO GP2000 vs NOCO GB40
The short answer
GOOLOO GP2000 comes out ahead overall with 6.6/10 against 5.9/10 for the NOCO GB40. GOOLOO GP2000 is stronger on starting power, battery capacity & standby, versatility and value. NOCO GB40 is stronger on build quality & durability and battery safety & sustainability. At current verified prices, the GOOLOO GP2000 costs about $49.99 less.
- Choose the GOOLOO GP2000 if: Budget buyers with small and mid-size gas engines who want a cheap, light glovebox pack.
- Choose the NOCO GB40 if: Owners of typical cars and small SUVs (up to 6.0L gas) who want a small, IP65 weatherproof pack sold and shipped by Amazon.
Scores by criterion
| Criterion | GOOLOO GP2000 | NOCO GB40 |
|---|---|---|
| Starting Power | 7.0Eight back-to-back boosts on a 2.5L engine (TechGearLab); weak on large engines. | 6.5Fine for typical cars; needed the override on a dead battery; 6L gas/3L diesel limit. |
| Battery Capacity & Standby | 6.037 Wh rated, unmeasured; 24-month standby claim. | 4.015.57 Wh measured of 24 Wh claimed; one jump took it to 25%. |
| Ease of Use & Safety Features | 6.3Simple controls; thin cables and a clunky case. | 6.06-inch leads and stiff clamps; simple controls; spark-proof. |
| Build Quality & Durability | 5.5Thin plastic; no IP rating confirmed. | 7.8IP65 with a long track record; soft bag only. |
| Versatility | 5.515W USB and a 400-lumen light; AC adapter sold separately. | 4.510W USB and a light only. |
| Battery Safety & Sustainability | 5.5No certification confirmed. | 6.0No sparks seen in testing; Prop 65 notice; no UL 2743 confirmed. |
| Value | 8.7Lab-proven repeat starts for about $70. | 6.0$99.95 is high for its capacity. |
Specifications
| Spec | GOOLOO GP2000 | NOCO GB40 |
|---|---|---|
| Peak Current | 2,000 A | 1,000 A |
| Max Gas Engine (rated) | 8 L | 6 L |
| Max Diesel Engine (rated) | 6 L | 3 L |
| Battery Chemistry | Lithium-ion | Lithium-ion |
| Rated Capacity | 37 Wh | 24 Wh |
| Measured Usable Capacity (TechGearLab) | — | 15.57 Wh |
| Weight | 1.2 lb | 2.4 lb |
| Built-in Air Compressor | No | No |
| Max USB Output | 15 W | 10 W |
| Water/Dust Rating | — | IP65 |
GOOLOO GP2000
Pros
- Handled eight consecutive boosts on a 2.5L engine
- Budget price
- Light
- 400-lumen work light
Cons
- Struggles with large engines
- Thin plastic and cables, and a clunky case
- 12V AC adapter sold separately
- Listings disagree on weight and engine rating, so check the details when ordering
The budget pick for owners of small and mid-size gas cars who want something light for emergencies.
Full GOOLOO GP2000 review →NOCO GB40
Pros
- IP65 water and dust resistance
- Compact at 2.4 lb
- Spark-proof and reverse-polarity protection
- Recommended by four major test outlets
- Sold by Amazon
Cons
- Small usable battery: 15.57 Wh measured
- Very short leads (about 6 in.), so the pack must sit on the battery
- Slow 10W USB-C and about 3 hours to recharge
- Soft bag rather than a hard case
A dependable weatherproof pack for typical cars and small SUVs. It ranks last on our weighted score because of its small battery, but it suits owners who value size and weather resistance. If you order one, check that the port is USB-C.
Full NOCO GB40 review →Both products are part of our guide The Best Jump Starters of 2026, where you can see every pick, how we score and current prices from each retailer.