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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 Wednesday, Mar 11
Order within 21 hours and 33 minutes
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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


Battery Cell Composition: Lithium


Voltage: 12 Volts


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


Vehicle Service Type: ATV, Motorcycle, Passenger Car, RV, Tractor, Truck, UTV, Van, Watercraft


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


Automotive Fit Type: ‎Universal Fit


Model: ‎GBX155


Item Weight: ‎7.01 pounds


Item model number: ‎GBX155


Batteries: ‎1 Lithium Ion batteries required.


Exterior: ‎Machined


Manufacturer Part Number: ‎GBX155


OEM Part Number: ‎GBX155


Position: ‎Unknown


Bulb Type: ‎LED


Special Features: ‎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, Portable Power Bank for USB Devices, Reverse Polarity and Spark-Proof Protection


Date First Available: February 19, 2021


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Mar 11

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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Similar Products

Top Amazon Reviews

    • It just works! Don't buy an El Cheapo "Gibberish Brand", buy this one! You WILL NOT be disappointed!
So, you're looking at this because you have a 1-ton truck? Dual batteries? And I'm guessing in the cold your engine simply just doesn't want to start, right? Or perhaps you've got a vehicle that loses battery charge after a couple days of being unused? Or perhaps you have a habit of accidentally leaving the dome light on all night? Or perhaps your battery just isn't up to snuff anymore and you just want to make sure it starts, regardless? And now you're looking at that price of $370 (at the time of this review) and thinking to yourself "There's got to be a cheaper one that will get the job done, right?" Short answer? Possibly. Shorter answer? DON'T! <] TLDR [> It absolutely works. It delivers the power it advertises. It's worth the money. If you want a boost pack that just works and you can afford it? Then just buy this one! You will NOT be disappointed! DO NOT buy the cheaper "Gibberish Brand" packs. If you do, you WILL be disappointed and they WILL leave you stranded. Yep. it really is that simple! My ONLY regret in buying this jump pack is that I didn't buy it sooner! I just couldn't justify the price tag... If I had known just how good it is, I'd have made room in the budget for it a lot sooner than I did! <] /TLDR [> I have a 1998 GMC K3500 with a dual battery setup. I do NOT have a block heater (yet). At zero degrees (F), it turns over but REFUSES to catch. After turning the engine over for roughly 10 seconds on a fresh full charge, it just quits. No go juice! And if you've done like I have by adding a manual override for your glow plugs because you upgraded them and know they can handle the extended burn time? It's still not enough. The batteries are just too small to be viable in the winter on the Canadian border where I am. Now that you have the backstory, I too was put off by the price. I watched a LOT of videos comparing various jump packs and every single one of them rated THIS pack, the NOCO Boost X GBX155 as the highest in every single list. I really had a tough time shelling out the cash for this, but now that I have it? I'll NEVER give it up! This thing is super easy to use. Charge it up when you get it. Believe it or not, for as heavy and bulky as this jump pack is, it charges FAST. From depleted to full charge in under 3 hours! That's AMAZING! If you have a dual battery diesel truck like me? You're going to be absolutely ASTONISHED at just how much power this thing packs. Its punch is nothing short of INCREDIBLE! When you hook it up to your battery, make sure you connect it to the battery that has the positive lead straight to the starter. While it'll work, connecting it to the accessory battery WILL cause a loss of power to the starter simply because of the cable run length from the accessory battery over to the primary start battery and then to the starter. Really, the only thing I can say I'm not too fond of is where they put the button to turn on the flashlight function. That darned thing is RIGHT where I grab it to pick it up and every time I pick it up I inadvertently press the flashlight button and let me tell you, it's pretty darned bright! This thing will also let you override the error condition on a FULLY depleted battery to allow you to jump the vehicle regardless of your battery voltage. Another really nice feature is the fact that it also has two USB-A ports to charge another device with, like your phone. The USB-C charging port can also be used to charge another USB-C device, too! The charging port goes two ways! The real reason you're looking at this specific jump pack though, is to find out if it lives up to its promises. I can tell you that yes, it absolutely does! Keep this in your vehicle and you'll end up being a hero to someone if they need a jump, too. No more need to carry long, heavy jumper cables if you've got this thing! You can rest easy if you have this jump pack. If you get into a spot of trouble because you left your headlights or marker lights or dome light on and ran your battery down while you were at the theater watching a movie or something? This will absolutely get you out of a jam. My truck is nearly 30 years old. I upgraded the starter to a planetary reduction gear starter. In the summer months, the dual batteries spin the engine decently with the specific starter I upgraded to. However, this jump pack? At ZERO degrees Fahrenheit, this jump pack cranks the engine over even faster than the dual batteries in the truck do! Because of where I am and my current vehicle situation, I'm having to jump the truck virtually every time I want to go somewhere. The truck's batteries just aren't enough and there's really no easy way to install bigger, more capable batteries under the hood. But, with this jump pack? I don't have to worry about whether the truck will start or not. It's virtually guaranteed it will. Without this jump pack, I'd be stuck most of the time in winter! You could call it peace of mind and you'd be accurate! If you're on the fence between this and a cheap one that's half the price or even a quarter of the price? Do yourself a favor! Forget the cheap ones, they don't stand a chance against this one. If you've got a family and you NEED your vehicle to just WORK regardless of having left that dome light on all night? You won't be disappointed if you have the NOCO Boost X GBX155. It's worth every penny! ... show more
Reviewed in the United States on January 1, 2026 by Frozen Acorns
    • Very useful for private and commercial use. Especially for diesel vehicles
This jump box is wonderful. When we were hauling cars, it was easy to use and jump started everything, including my semi trucks. Battery lasts a while and it is easy and light to carry unlike other jump boxes with similar claims. We do not haul vehicles anymore, but we still keeps these in our semi trucks as a safety standard in case our drivers need to jumpstart the trucks so they aren't wasting hours on end, waiting for roadside to get to them. ... show more
Reviewed in the United States on March 1, 2026 by Roman
    • Probably the best jump box available in it's price range!!
It's a beast 💪, this thing will start my diesel dually with no batteries in it. It was resold because it was returned, but I couldn't tell if the box was even opened. 265 bucks. I couldn't pass that up. I bought a 120 volt 65 watt charger that worked great and charges in 45 minutes. If your on the fence? Just grab it. You'll be happy. ... show more
Reviewed in the United States on March 1, 2026 by JEFF
    • Batteries Fail Prematurely
Update November 2, 2024 I purchased a second GBX155, thinking the first time was a fluke… It also failed in less than 13 months, just simply stops turning on… their warranty and repair is totally worthless…I copied it below in the review, costs more than buying a new unit in most cases. Save yourself some hassle and purchase another brand. I have the GBX 155 and it’s smaller brother, I bought them both at the same time in November 2021. They worked great for jumping, but they both died within a few weeks of each-other in September 2023. My old lead acid jumper is has been in service for around 5 years, and still works great. They should last longer than 22 months. Especially with light, occasional uses! Other than dying prematurely, they are nice jump packs. Here’s their awful warranty policies from their website as of 11/2/24. The cost to repair is more than the cost to purchase. In-Warranty: Months 0-12 Within the warranty period, any defective item will be replaced free of charge. Advanced replacement for In-Warranty claims is available with a credit card payment for the full retail amount. The full payment amount will be refunded within 10 business days after return is received. The defective unit must be returned to NOCO within 30 days for a credit to be issued. For claims outside of the scope of the warranty, including accidental damage or abuse, the replacement cost is $499.95. Out-Of-Warranty: Months 13-48 Months 13-24: Any defect is a flat $399.95 Repair Fee per occurrence. Months 25-36: Any defect is a flat $499.95 Repair Fee per occurrence. Months 37-48: Any defect is a flat $599.95 Repair Fee per occurrence. Out-Of-Warranty repairs exclude any claims outside of the scope of the warranty, including accidental damage or abuse. If a unit has damage deemed outside of the scope of warranty by NOCO, the customer is responsible for all shipping costs to have the unit returned. It is the sole discretion of NOCO to determine if damage is outside of the scope of the warranty. Advanced replacement options for Out-Of-Warranty depends on product availability and requires a credit card payment for the full retail amount that is currently listed on our website. The full payment amount, minus repair fee indicated above, will be refunded within 10 business days after return is received. The defective unit must be returned to NOCO within 30 days for a credit to be issued. If the defective unit is damaged or deemed outside of the scope of the warranty by NOCO, the customer must return the replacement unit within 15 business days or forfeit the full payment for the unit. To begin the warranty process, please contact [email protected]. To expedite the process, please send a digital copy of your proof of purchase, the units serial number, and detailed description of the problem. ... show more
Reviewed in the United States on October 5, 2023 by George

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