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NOCO

NOCO Boost X GBX155: 4250A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack, Portable Jump Box, Power Bank & Jumper Cables - for 10.0L Gas and 8.0L Diesel Engines

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Availability: In Stock.
Fulfilled by Amazon
Arrives Sunday, Aug 3
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Features

  • X FOR EXTREME A new class of lithium jump starters. Rated at 4,250 amps for powerful starts on gas engines up to 10.0L and diesel engines up to 8.0L - built for extreme performance.
  • ULTRASAFE 2.0 Upgraded spark-proof and reverse polarity protection with enhanced thermal efficiency and power management for even safer operation and extended battery life.
  • TURBO CHARGEABLE Recharges in just 2.7 hours via USB-C Power Delivery, or gain enough power for a jump start in just 5 minutes - even from a completely depleted battery.
  • 60-SECOND TIMER Integrated 60-second timer conserves power from its high-voltage design - delivering up to 18 jump starts per charge with extreme energy at every start.
  • CHARGE EVERYTHING 60-watt USB-C Power Delivery lets you charge phones, tablets, laptops, and more. Dual-direction charging turns Boost X into a high-output portable power bank.
  • INTEGRATED LED FLASHLIGHT Precision-engineered 500-lumen LED with 7 light modes, including SOS and strobe. Illuminate repairs, emergencies, or low-light environments.
  • WHATS IN THE BOX GBX155 jump starter, heavy-duty clamps, USB-C charging cable, and microfiber storage bag. Backed by a 1-year warranty and engineered in the USA.

Description

The GBX155 Boost X is a new class of portable lithium jump starters—engineered for extreme performance and rated at 4,250 amps to start gas engines up to 10.0 liters and diesel engines up to 8.0 liters. Featuring our upgraded UltraSafe 2.0 technology, it offers spark-proof connections and reverse polarity protection, now with enhanced thermal efficiency and power management for even greater safety and battery life. Designed with a high-voltage output system, the GBX155 includes an integrated 60-second timer to conserve energy—delivering up to 18 jump starts per charge with maximum power on every start. Even if completely depleted, it can gain enough power for a jump start in just 5 minutes or fully recharge in only 2.7 hours via USB-C Power Delivery. A 60-watt USB-C port provides both input and output, turning Boost X into a high-performance power bank for fast charging phones, tablets, laptops, and other USB-C devices. A precision-engineered 500-lumen LED flashlight features seven modes, including SOS and strobe, to light up dark workspaces or help in roadside emergencies. The GBX155 jump starter comes complete with heavy-duty jumper clamps, a USB-C charging cable, and a microfiber storage bag, all backed by a 1-year limited warranty and proudly engineered in the USA. Whether you’re looking for a car jump starter, battery jump box, jumper pack, power pack jump starter, or a reliable jump starter battery pack to keep in your glovebox, the GBX155 delivers unmatched performance, trusted durability, and peace of mind—on the road, off the grid, or wherever your next adventure takes you.

Brand: NOCO


Product Dimensions: 8.18"D x 4.84"W x 13.51"H


Item Weight: 7.01 Pounds


Amperage: 4250 Amps


Peak Output Current: 4250 Amps


Brand: ‎NOCO


Product Dimensions: ‎8.18"D x 4.84"W x 13.51"H


Item Weight: ‎7.01 Pounds


Amperage: ‎4250 Amps


Peak Output Current: ‎4250 Amps


Specification Met: ‎energy


Manufacturer: ‎NOCO


UPC: ‎046221200096


Global Trade Identification Number: ‎96


OEM Part Number: ‎GBX155


Automotive Fit Type: ‎Universal Fit


Model: ‎GBX155


Item Weight: ‎7.01 pounds


Country of Origin: ‎China


Item model number: ‎GBX155


Batteries: ‎1 Lithium Ion batteries required.


Exterior: ‎Machined


Manufacturer Part Number: ‎GBX155


Position: ‎Unknown


Bulb Type: ‎LED


Special Features: ‎Portable Power Bank for USB Devices, Reverse Polarity and Spark-Proof Protection, 4250A 12V Portable Lithium Car Battery Jump Starter Power Pack, 500 Lumen LED Flashlight with Multiple Modes, including SOS., 60-Watt USB-C Power Delivery Technology


Date First Available: February 19, 2021


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Aug 3

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Good BUY.
Must have! I works very well just in one go. Battery life is very good, holds charges for long time. My car battery was dead and just one click it started right away.
Reviewed in the United States on July 23, 2025 by Amazon FAN!!!
    • Best jumper I've ever had. Worth every penny
What's needed to jump start all these new cars. If you have a newer car that 5 years are newer with the battery under the seat are in the trunk area. You need this one to jump start your car. I work as a tech and work for a luxury brand that's a pain in the ass to jump start do to battery location. Also these newer EV cars that have the 12v battery go dead. You really need a lot of power to get them enough 12v power to place them on the charger to charge the HV battery. Without a good 12v battery the HV battery can not be charged. So you get a car with a dead 12v battery and need to change the HV battery because it's low, you're in trouble. On other cars with the jump points so far from the battery and the battery buried, you need this much power. Love the size and weight compared to older jumpers I've had. So easy to carry to the car. Has held up fantastic with its constant use. Charges up quickly with the higher rate charging plug. You do need to get this unless you want very slow charging with your normal phone charger. ... show more
Reviewed in the United States on July 26, 2025 by Paul
    • Does the job and does it well. Very well.
This particular model sits on the threshold of commercial and home use. If you are only jumping the occasional four or six-cylinder passenger vehicle, it is probably excessive for your needs. If you have a need to potentially jump multiple vehicles in a day or vehicles with larger engines, or a combination therof, the GBX155 will suit you well. Also, it is easily stored in the optional storage case, which I recommend, and is both smaller and lighter than other competitors with similar capabilities. Will start anything from a medium-duty truck and below with little to no issue in sub-zero conditions. It just might need a top off charge right after if you are jumping something more demanding, such as a mid-size to larger diesel engine or large gas engine in colder weather, which isn't difficult and can be done via USB-C fast charge in your vehicle between calls with the appropriate charger. I use this model for roadside assistance duty and it has no problem keeping up with jumping battery after battery in below freezing conditions so long as you monitor the battery level after each use and top off accordingly (much below a green charge level in colder weather and it will start to struggle with bigger engines if the battery is completely dead). Pro Tip: do not leave this, or any other NOCO chargers in your vehicle during extreme (hot or cold) temperatures. If they are too hot or cold, they will not provide power to your vehicle battery. ... show more
Reviewed in the United States on January 20, 2025 by Erin
    • Very disappointed
Very disappointed with this product. Seemed like a nice investment specially with all the good reviews. I purchased mines for a personal Christmas gift this past December , used it once when I went to charge my jumper , it will not charger at all . I brought a stronger voltage charger because the one that comes with the jumper isn't strong enough. I tried charging the jumper with the cigarette lighter charger that won't work . After doing much more research it seems a lot of people have issues with this product charging specifically when the battery gets low .To be honest this product cost way to much to have this defect it shouldn't matter if the battery is low why are people having issues with the jumper not charging. I paid for warranty ( asurion ) from Amazon and filed a claim. They responded saying this issue is still covered by the original manufacturer's warranty Please contact THE NOCO COMPANY. Don't make sense even if it is I paid for warranty from you why should I be inconvenience. Anyways if you do decide to purchase this jumper do your research ... show more
Reviewed in the United States on June 1, 2025 by Love
    • This is the ONE! Don't hesitate.
This is the one! If you are thinking about getting one or thinking about the TikTok shop one, think again. This is it. It'll start whatever you've got. Again and again. I've pulled up on people charging with cables, boxes, what have you and every one has been left in the dust. They'll say "i already tried with mine and it's dead dead." It'll start. Within 15-30 seconds. Most often times , instantly. I've started big diesel boats, trucks, cars. I even ran my mini excavator on it for a half hour in the pass through mode with it. During hurricanes it charges all my devices. I'd buy one for each of my family members if I had the money. You will not be disappointed! If you can, get the lil case too. It's going on three years now with mine and I'd never use anything else again. Use: Charges everything Battery life: almost three years and i charge it occasionally. I've jumped more vehicles than I've charged it. Portable: With the case it just sits neatly in my truck at ALL times. Charging speed: that CAN take a while depending on what you use to charge it. I just leave it overnight Build quality: i destroy stuff and this looks almost like the day i got it. Why did you pick this product vs others?: It looked great and i liked it. ... show more
Reviewed in the United States on July 2, 2025 by Nickolas Wilkerson
    • It’s a keeper! Buy it!
I bought this in January 2024 and I was not disappointed! This thing is a beast. Where other jumpers fail, this one works all the time. It’s very easy to use. The battery life is long. I highly recommend this to everyone. My son and brother are fighting over who gets to keep it. So far brother is winning. He is hiding it from my son! Excellent product! ... show more
Reviewed in the United States on May 15, 2025 by Kindle Customer

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