NOCO Boost X GBX155 4250A UltraSafe Jump Starter Power Pack 12V Battery Booster
Couldn't Load Pickup availability
GBX155 - Boost X Extreme power for the most difficult jump starts.
UltraSafe Jump Starter 4250A 12V BOOST X
- RATED AT 4250A
- UP TO 10.0L PETROL ENGINES
- UP TO 8.0L DIESEL ENGINES.
- JUMP START 12V BATTERIES.
Introducing a new kind of jump starting experience featuring our latest PX Lithium Technology that delivers incredible power, ultra-fast charging, and unmatched versatility. This isn't an upgrade— it's a whole new series. The new Boost X offers more starting power and unleashes maximum power delivery for the most demanding starts. Paired with USB-C Power Delivery technology to recharge insanely fast.
SPARK-PROOF. REVERSE POLARITY PROTECTION.
We took our UltraSafe technology and made it better— UltraSafe 2.0. It's still our simple, mistake-free design featuring spark-proof technology and reverse polarity protection, but with enhanced thermal efficiency and power management to provide better performance and longer battery life.
START VEHICLE WITHIN 60 SECONDS. AUTO POWER CONSERVATION.
Start the vehicle within 60 seconds after pressing the power button on Boost. After the 60-second timeout is complete, the unit must be powered off, then back on, to initiate a new jump-start sequence. The yellow power LED indicates the 60-second sequence is over and can be reset if another jump start sequence is needed.
UP TO 60W FAST CHARGING. CHARGE DEVICES.
Power everything. With USB-C Power Delivery, you have the power to charge almost everything. Its internal power bank provides 60-watts of power— both in and out— to effortlessly power our favorite USB-C devices, like phones, tablets, laptops, wearables, and more.
ULTRA-BRIGHT. 500 LUMENS.
More than a jump starter, Boost X is a useful tool for daily use and emergency situations alike. The GBX155 is equipped with a 500-Lumen LED flashlight with various brightness modes, SOS, and emergency strobe— handy to have as a roadside or road trip tool.
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 Amps / 20 Volts 3 Amps |
| USB Output USB-A | 5 Volts 2.1 Amps Max / 10 Watts Max USB-C: 5 Volts 3 Amps / 9 Volts 3 Amps / 12 Volts 3 Amps / 15 Volts 3 Amps / 20 Volts 3 Amps |
| Product Size Height | 6.89in (175mm) Width: 12.03in (305.6mm) Depth: 2.72in (69.1mm) Weight: 5.82lbs (2.64kg) |
| IP Rating IP Rating | IP65 (w/ Ports Closed) |
More specs
| |
What's Included
- GBX155 Lithium Jump Starter
- Integrated HD Precision Battery Clamps
- USB-C to USB-C Cable
- 24in 12V 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 GBX155
From our tech experts at CEN
A lithium jump starter, rated at 4250A, 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. At this rating it will turn larger petrol and diesel engines, not just small cars.
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
Save 15% Best Seller NOCO Boost X GBX75 2500A UltraSafe Jump Starter Power Pack 12V Battery Booster RRP£259.95£219.95 / Save 15%In stock
Save 7% Best Seller NOCO Boost X GBX45 1250A UltraSafe Jump Starter Power Pack 12V Battery Booster RRP£134.95£124.95 / Save 7%In stock
Save 11% Best Seller NOCO Boost GB20 500A UltraSafe Jump Starter Power Pack 12V Car Battery Booster RRP£89.95£79.95 / Save 11%In stock
Save 10% Best Seller NOCO Boost GB150 3000A UltraSafe Jump Starter Power Pack 12V Car Battery Booster RRP£309.95£279.95 / Save 10%In stock
Highly Rated NOCO Boost GB40 1000A UltraSafe Jump Starter Power Pack 12V Car Battery Booster £109.95 /In stock
Best Seller NOCO AL5 Portable 5A 130 PSI Lithium Air Compressor Tyre Inflator for Cars Bikes £69.95 /In stock
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.
