NOCO Boost X GBX45 Jump Starter Review
A 1,250-amp lithium jump starter for gasoline engines up to 6.5 L and diesel engines up to 4.0 L, with 60 W USB-C charging in and out.
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 best small NOCO for a car, crossover or half-ton truck if you charge everything over USB-C. Owners of big diesels should look at the GB70 or GB150.
Pros and cons
Pros
- Covers gasoline engines up to 6.5 L and diesels up to 4.0 L, a step above the Boost Plus GB40
- Recharges in about 0.8 hours from a 60 W USB-C charger, by NOCO's figures
- USB-C port also charges phones and laptops at up to 60 W
- IP65 housing at 2.16 lb
Cons
- No 12 V accessory output, so it cannot run a tire inflator
- NOCO does not publish a jump-starts-per-charge figure for this model
- Works with 12-volt lead-acid batteries only
- A 1-year warranty is short for this category
Specifications
| Peak current | 1,250 A |
|---|---|
| Gas engines | Up to 6.5 L |
| Diesel engines | Up to 4.0 L |
| Battery capacity | 31 Wh |
| USB output | USB-A 5 V, 2.1 A (10 W); USB-C up to 20 V, 3 A (60 W) |
| Recharge time | 0.8 hours at 60 W over USB-C; 4 hours at 10 W |
| Flashlight | 100 lumens |
| Water and dust rating | IP65 with ports closed |
| Weight | 2.16 lb (0.98 kg) |
| Warranty | 1 year |
Who it suits
Drivers of gasoline cars, crossovers and half-ton trucks with engines up to 6.5 L, and small diesels up to 4.0 L, who want a starter they can top up from the same USB-C charger as their phone and laptop. NOCO rates a full recharge at about 0.8 hours with a 60 W USB-C charger.
It replaces the older Boost Plus GB40 for most buyers: see GBX45 vs GB40.
Who should skip it
Anyone with a diesel pickup larger than 4.0 L, and anyone who wants a 12 V socket to run a tire inflator or other accessory. The Boost HD GB70 adds a 12 V, 15 A output and covers diesels up to 6.0 L.
What we could not confirm
NOCO gives no jump-starts-per-charge figure for the GBX45 on its product or support pages, and the dimensions were not listed in a form we could read, so both are left out of the table.
Frequently asked questions
- What size engine can the NOCO GBX45 start?
- NOCO rates the GBX45 for gasoline engines up to 6.5 liters and diesel engines up to 4.0 liters, at 1,250 peak amps.
- How fast does the GBX45 recharge?
- About 0.8 hours with a 60 W USB-C charger, according to NOCO. With a 10 W charger it takes about 4 hours.
- Does the GBX45 have a 12V outlet?
- No. NOCO says Boost X has no 12 V output connection; it can only power USB and USB-C devices.
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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