NOCO Boost X GBX55 1750A UltraSafe Jump Starter Power Pack 12V Battery Booster
Couldn't Load Pickup availability
The NOCO Boost X GBX55 is a 1750A lithium jump starter for 12V lead-acid batteries, rated for petrol engines up to 7.5 litres and diesel engines up to 5.0 litres, with 60W USB-C power delivery and a 200-lumen LED torch. It is part of the NOCO Boost X range.
This listing is the GBX55 1750A. The Boost X range is also available in the GBX45 1250A.
Key specifications
- Starting current: 1750A (peak)
- Battery types: 12V lead-acid
- Engine rating: Petrol up to 7.5L, diesel up to 5.0L
- Internal battery: 46Wh lithium-ion
- USB-C: 60W input and output (Power Delivery)
- USB-A output: 5V 2.1A
- LED torch: 200 lumens
- Size and weight: 124.5 x 194.5 x 63.5 mm (H x W x D), 1.17 kg
- IP rating: IP65 (with ports closed)
GBX55 Boost X: extreme power for the most difficult jump starts
- 1750A peak starting current
- Petrol engines up to 7.5L
- Diesel engines up to 5.0L
- Jumps 12V lead-acid batteries
The Boost X uses NOCO's PX Lithium Technology for high starting power, ultra-fast charging, and USB-C Power Delivery. It is a new series rather than an incremental update to earlier Boost models.
Spark-proof, reverse polarity protection
The GBX55 uses UltraSafe 2.0 — NOCO's spark-proof, reverse polarity-protected design with enhanced thermal efficiency and power management for better performance and longer battery life.
Start vehicle within 60 seconds, auto power conservation
Press the power button to begin a 60-second jump-start sequence. If the vehicle is not started within that window, the unit must be powered off and back on to initiate a new sequence. The yellow power LED indicates when the 60-second period has elapsed.
Up to 60W fast charging for your devices
The built-in 46Wh power bank delivers 60W via USB-C Power Delivery — in and out — to charge phones, tablets, laptops, and wearables. A 5V 2.1A USB-A output is also included.
Ultra-bright 200-lumen LED torch
The integrated 200-lumen LED flashlight offers multiple brightness modes, SOS, and emergency strobe, making the GBX55 a practical roadside tool beyond jump starting alone.
Explore the full range in NOCO Jump Starters.
Specification
| Battery | Types 12 Volt Lead-Acid Batteries |
|---|---|
| USB Input USB-C | 5 Volts 1.5 Amps / 9 Volts 3 Amps / 12 Volts 3 Amps / 15 Volts 3 |
| USB Output USB-A | 5 Volts 2.1 Amps Max / 10 Watts Max USB-C: 5 Volts 3 Amps / |
| Product Size Height | 4.9in (124.5mm) Width: 7.66in (194.5mm) Depth: 2.5in |
| (63.5mm) Weight | 2.58lbs (1.17kg) |
| IP Rating IP Rating | IP65 (w/ Ports Closed) |
More specs
| |
What's Included
- GBX55 Lithium Jump Starter
- Integrated HD Precision Battery Clamps
- USB-C to USB-C Cable
- Microfiber Storage Bag
- Safety & Warranty Information
Build your own bundle
Choose every part yourself — the more you add, the more you save.
NOCO
About the NOCO GBX55
From our tech experts at CEN
A lithium jump starter, rated at 1750A, small enough to live in the boot and start a car without another vehicle or a set of leads.
Who it suits
Anyone who has been stranded by a flat battery, and drivers of cars that sit for long periods — classics, second vehicles, campers and anything seasonal.
Our tech experts advise
Keep it charged: a jump starter that has sat in a cold boot for a year is no use when you need it. Check the rating suits your engine size, particularly for diesels, which need considerably more current than petrol engines of the same capacity. get in touch if you are unsure which model fits your vehicle.
Explore the full NOCO range at CEN, with fast UK dispatch and expert advice from our Nottingham team. Shop all NOCO
Recommended For You
Discover more top-rated gear, handpicked to go with what you're viewing
More from NOCO Jump Starters
More options from the same range, in stock and ready to go
Staff PickNOCO Boost X GBX155 4250A UltraSafe Jump Starter Power Pack 12V Battery Booster
RRP £379.95Save 7%£349.95
PopularNOCO Boost GB20 500A UltraSafe Jump Starter Power Pack 12V Car Battery Booster
RRP £89.95Save 11%£79.95
NOCO Boost GB40 1000A UltraSafe Jump Starter Power Pack 12V Car Battery Booster
£109.95
NOCO Boost Max GB251+ 3000 UltraSafe Jump Starter Power 24V Battery Booster
£1,199.95
NOCO Boost Max GB250+ 5250 UltraSafe Jump Starter Power 12V Battery Booster
£1,199.95
Frequently Asked Questions
Q: Will this jump starter work on my vehicle?
A: Jump starters are rated by engine size and fuel type. The maximum petrol and diesel engine capacities are listed in the Specification tab. Choose a unit rated at or above your engine size.
Q: Is a lithium jump starter safe to use?
A: Yes. Modern lithium jump starters include spark-proof connections and reverse polarity protection, making them safer and far more portable than traditional boosters.
Q: How long does the jump starter hold its charge?
A: Quality lithium jump starters hold a usable charge for months in the glovebox or boot. Topping up every few months keeps it ready, and charge time from flat is listed in the Specification tab.
Q: What size engine can the NOCO GBX55 start?
A: The GBX55 is rated for petrol engines up to 7.5 litres and diesel engines up to 5.0 litres, on 12V lead-acid batteries, with 1750A peak starting current.
Q: Can the GBX55 charge my phone or laptop?
A: Yes. Its USB-C Power Delivery port provides up to 60W in and out, enough for phones, tablets and many laptops, and there is also a USB-A output rated at 5V 2.1A.
Q: Why does the GBX55 have a 60-second window?
A: After you press the power button you have 60 seconds to start the vehicle. Once the timeout ends, the yellow power LED shows and the unit must be switched off and on again to start a new jump-start sequence. This conserves power.
