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NOCO Boost X GBX155 4250A UltraSafe Jump Starter Power Pack 12V Battery Booster

NOCO Boost X GBX155 4250A UltraSafe Jump Starter Power Pack 12V Battery Booster - Main image
$231.77 $379.95 In stock

Category: Battery Jump Starter

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.

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.6 / 5 · 5 reviews)

Natalie Q. ★★★★★

I’ve got an 8-liter diesel work truck that’s sat through three brutal winters, and this thing spun it over like it was summer—that 4250A rating is no joke. The clamps have a solid, confident bite, and the whole unit feels rugged enough to live in my toolbox year-round.

Brian ★★★★★

Pulled the trigger on this after my old unit finally gave up, and it fired up my dead 6.2L Silverado in seconds without even breaking a sweat. That 4250A rating is no joke, and the ultra-safe spark-proof clamps gave me real peace of mind fumbling around in the dark.

Grace ★★★★★

My old jumper couldn't touch my 7.3L diesel, but this thing cranked it over on the first try this morning. The 4250A rating isn't just marketing – it fired up a cold block that's been sitting for weeks without breaking a sweat.