NOCO Boost XL GB50 Jump Starter Review
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.
By Watt Versus Editorial· Updated
This page was drafted with AI assistance from manufacturers' specs and manuals, and is checked by our editor.
Our verdict
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 and cons
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
Specifications
| Peak current | 1,500 A |
|---|---|
| Gas engines | Up to 7.0 L |
| Diesel engines | Up to 4.5 L |
| Battery capacity | 35 Wh |
| Jump starts per charge | Up to 30 |
| USB output | 5 V, 2.1 A |
| Recharge time | 4.5 hours at 2 A, 9 hours at 1 A (data sheet) |
| Flashlight | 200 lumens, 7 modes |
| Water and dust rating | IP65 with ports closed |
| Weight | 1.65 lb (2.71 lb with clamps and accessories) |
| Warranty | 1 year |
Who it suits
Owners of midsize cars, crossovers and light pickups, including V6 and small V8 gasoline engines up to 7.0 L and diesels up to 4.5 L. NOCO rates the GB50 at 1,500 peak amps with up to 30 jump starts per charge, an IP65 housing with the ports closed and a 200-lumen light. It sits between the GB40 and the GB70; see GB50 vs GB40.
Who should skip it
Anyone who wants to recharge it from a laptop charger: the Boost X GBX55 has a 60 W USB-C port and a slightly higher engine rating. Owners of big trucks or diesels over 4.5 L should look at the best jump starters for trucks and SUVs.
What we could not confirm
NOCO's product page says the GB50 recharges in 3 hours at 2.1 A, while its data sheet lists 4.5 hours at 2 A and 9 hours at 1 A; we show the data sheet. The product page gives 2.7 lb, which matches the data sheet's weight with clamps and accessories (2.71 lb); the unit alone is 1.65 lb.
Frequently asked questions
- What size engine will the NOCO GB50 start?
- NOCO rates it for gasoline engines up to 7.0 L and diesel engines up to 4.5 L.
- How many jump starts does the GB50 give per charge?
- Up to 30, according to NOCO.
- Is the NOCO GB50 waterproof?
- NOCO rates the housing IP65 with the ports closed, which means dust-tight and protected against water jets, not submersion.
Sources
The specifications and claims on this page come from these manufacturer documents. Figures are the manufacturers' own unless the text says otherwise.
Ready to buy the NOCO Boost XL GB50 Jump Starter?
Prices change often. See the current price and availability on Amazon.
Compare and read more
VS comparison
NOCO Boost XL GB50 Jump Starter vs NOCO Boost Plus GB40 Jump Starter
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.
Updated October 26, 2026
Best of
Best NOCO Jump Starters by Engine Size (2026)
NOCO makes the Boost range in sizes for every engine. Here is which one to buy for a motorcycle, a car, a V8 truck or a heavy-duty diesel.
Updated October 26, 2026
Best of
Best Jump Starters by Engine Size and Use (2026)
Seven jump starters from four makers, matched to engine size and how you will use them, from glovebox starters to a shop booster pack.
Updated October 26, 2026