Head-to-head comparison · Jump Starters
NOCO Boost XL GB50 vs Boost Plus GB40
Two classic NOCO Boost lithium starters with the same IP65 rating and 5 V USB port. The GB50 adds 500 amps, a 7.0 L gasoline and 4.5 L diesel rating, more starts per charge and a brighter light.
By Watt Versus Editorial· Updated
This page was drafted with AI assistance from manufacturers' specs and manuals, and is checked by our editor.
Why the NOCO Boost XL GB50 Jump Starter wins
The GB50 covers V8 engines up to 7.0 L and diesels up to 4.5 L, where the GB40 stops at 6.0 L and 3.0 L, and it gives up to 30 starts per charge against 20. The GB40 still makes sense for four- and six-cylinder cars if you want the smaller pack.
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NOCO Boost XL GB50 Jump Starter
A 1,500-amp lithium jump starter rated for gasoline engines up to 7.0 L and diesels up to 4.5 L, with up to 30 starts per charge.
NOCO Boost Plus GB40 Jump Starter
A 1,000-amp lithium jump starter rated for gasoline engines up to 6.0 L and diesel engines up to 3.0 L.
Side-by-side
Specs compared
| Specification | NOCO Boost XL GB50 Jump StarterOur pick | NOCO Boost Plus GB40 Jump Starter |
|---|---|---|
| Editorial score | Editorial score:8.3/10 | Editorial score:8.2/10 |
| Best for | Best for Midsize Cars and Small Diesels | — |
| Peak current | 1,500 A | 1,000 A |
| Gas engines | Up to 7.0 L | Up to 6.0 L |
| Diesel engines | Up to 4.5 L | Up to 3.0 L |
| Battery capacity | 35 Wh | — |
| Jump starts per charge | Up to 30 | Up to 20 |
| USB output | 5 V, 2.1 A | 5 V, 2.1 A |
| Recharge time | 4.5 hours at 2 A, 9 hours at 1 A (data sheet) | 3 hours at 2 A, 6 hours at 1 A |
| Flashlight | 200 lumens, 7 modes | 100 lumens, 7 modes |
| Water and dust rating | IP65 with ports closed | IP65 with ports closed |
| Weight | 1.65 lb (2.71 lb with clamps and accessories) | 2.4 lb |
| Warranty | 1 year | 1 year |
| Dimensions | — | 6.7 x 3.2 x 1.7 in |
| Where to buy | Check Latest Price on Amazon (paid link) | Check Latest Price on Amazon (paid link) |
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At a glance
Key differences
- 1Peak current: 1,500 A against 1,000 A
- 2Gasoline engines: up to 7.0 L against 6.0 L
- 3Diesel engines: up to 4.5 L against 3.0 L
- 4Jump starts per charge: up to 30 against 20
- 5Flashlight: 200 lumens against 100
Product by product
Pros and cons
NOCO Boost XL GB50 Jump Starter
The classic Boost to buy for V6 and small V8 cars, or a small diesel up to 4.5 L. For fast USB-C charging pick the Boost X GBX55; for a full-size truck, the GB70 or GB150.
Pros
- Covers gasoline engines up to 7.0 L and diesels up to 4.5 L
- Up to 30 jump starts per charge, against 20 for the GB40
- IP65 with the ports closed
- 200-lumen light with seven modes
Cons
- No 12 V output for an inflator, unlike the GB70 and GB150
- USB output is 5 V, 2.1 A only; no fast USB-C charging like the Boost X range
- NOCO's product page and data sheet give different recharge times
NOCO Boost Plus GB40 Jump Starter
The sensible default for a gasoline car or SUV. Diesel truck owners should step up to the GB70.
Pros
- Covers most cars, crossovers and half-ton trucks with gasoline engines up to 6.0 L
- Spark-proof clamps and reverse-polarity protection
- IP65 housing and a compact 2.4 lb body
- Up to 20 jump starts per charge, by NOCO's figures
Cons
- Diesel rating stops at 3.0 L, too small for most diesel pickups
- A 1-year warranty is short for this category
- Works with 12-volt lead-acid batteries only
Choose the NOCO GB50 if
- Your engine is a V8 up to 7.0 L or a diesel up to 4.5 L.
- You want more starts between recharges.
Choose the NOCO GB40 if
- You drive a four- or six-cylinder car up to 6.0 L.
- You want the smaller of the two for a glovebox.
Neither has a 12 V output or USB-C fast charging; for those, see the GB70 and the Boost X GBX55. All NOCO models are in the best NOCO jump starters.
Frequently asked questions
- Is the NOCO GB50 worth it over the GB40?
- If your engine is over 6.0 L gasoline or 3.0 L diesel, yes: NOCO rates the GB50 for 7.0 L gasoline and 4.5 L diesel. For smaller engines the GB40 is enough.
- How many jump starts do the GB40 and GB50 give?
- Up to 20 for the GB40 and up to 30 for the GB50, by NOCO's figures.
- Are both waterproof?
- Both are rated IP65 with the ports closed.
Sources
The specifications and claims on this page come from these manufacturer documents. Figures are the manufacturers' own unless the text says otherwise.
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