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NOCO

NOCO Boost X GBX45: 1250A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack, Portable Jump Box, Power Bank & Jumper Cables - for 6.5L Gas and 4.0L Diesel Engines

  • Based on 13,626 reviews
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$124.95 Why this price?
Black Friday Deal · 22% off was $159.94

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This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2026

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Availability: In Stock.
Fulfilled by Amazon
Arrives Monday, Dec 1
Order within 23 hours and 3 minutes
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Features

  • X FOR EXTREME A new class of lithium jump starters. Rated at 1,250 amps for powerful starts on gas engines up to 6.5L and diesel engines up to 4.0L - 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 48 minutes 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 6 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 100-lumen LED with 7 light modes, including SOS and strobe. Illuminate repairs, emergencies, or low-light environments.
  • WHATS IN THE BOX GBX45 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 GBX45 Boost X is a new class of portable lithium jump starters—engineered for extreme performance and rated at 1,250 amps to start gas engines up to 6.5 liters and diesel engines up to 4.0 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 GBX45 includes an integrated 60-second timer to conserve energy—delivering up to 6 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 48 minutes 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 100-lumen LED flashlight features seven modes, including SOS and strobe, to light up dark workspaces or help in roadside emergencies. The GBX45 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 GBX45 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: 3.62"D x 4.96"W x 8.23"H


Item Weight: 1.2 Kilograms


Amperage: 1250 Amps


Peak Output Current: 1250 Amps


Brand: ‎NOCO


Product Dimensions: ‎3.62"D x 4.96"W x 8.23"H


Item Weight: ‎1.2 Kilograms


Amperage: ‎1250 Amps


Peak Output Current: ‎1250 Amps


Specification Met: ‎energy


Manufacturer: ‎NOCO


UPC: ‎046221200065


Global Trade Identification Number: ‎65


Automotive Fit Type: ‎Universal Fit


Model: ‎GBX45


Item Weight: ‎2.64 pounds


Item model number: ‎GBX45


Batteries: ‎1 Lithium Ion batteries required.


Exterior: ‎Machined


Manufacturer Part Number: ‎GBX45


OEM Part Number: ‎GBX45


Bulb Type: ‎LED


Special Features: ‎100 Lumen LED Flashlight with Multiple Modes, including SOS., 1250A 12V Portable Lithium Car Battery Jump Starter Power Pack, 60-Watt USB-C Power Delivery Technology, Portable Power Bank for USB Devices, Reverse Polarity and Spark-Proof Protection


Date First Available: April 9, 2021


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Dec 1

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.

  • Klarna Financing
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  • Affirm Financing
  • Afterpay Financing
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  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Perfect for Jumping my Cars and Truck
I often leave our cars sitting for a while and have had to jump them. This has helped when needed, although I now attach a small solar panel to keep them topped up. When needed, this worked Great and helped provide the power i needed to jump start the car with hardly any effort at all...So Easy! Only time i had an issue is when the battery was so depleted that the unit did not turn on as it did not detect voltage, but i was able to use another power source to "trick" it into turning on. Ovewrall this is a Great investment so you dont have to reply on others to jump your car if needed. ... show more
Reviewed in the United States on August 14, 2025 by Paul M
    • Excellent product
Review Image by Yusvel Yusvel
Review Image by Yusvel Yusvel
Excellent product, very versatile and easy to use. With a full charge I have been able to start my car several times and the charge has a great performance, I recommend it 100%
Reviewed in the United States on October 17, 2025 by Yusvel Yusvel
    • Great jump starter
PRO - Works great at jumping very low or even dead battery, as long as it's not too far gone. PRO - Compact and easy to use. CON - Takes longer than 48 minutes to full charge on USB-C. CON - Pressing "Override" button takes about 2/3 of the charge off the device. This is an excellent portable jump starter that will get you back on your way. It's easy to use and store. ... show more
Reviewed in the United States on September 2, 2025 by Dogs Rock
    • I recommend this product to all the drivers out there
Review Image by Doris Doris
Noco boost GBX45 ultra safe jump starter, the best purchase I made small and powerful. I was very skeptic about small product that turns car engine on in seconds. Very easy to use. Fit perfectly in the trunk where the spare tire is.
Reviewed in the United States on November 1, 2025 by Doris Doris
    • Just Buy it, its completely worth it
Just go ahead and buy it, it’ll save you one day trust me. Let me tell a little true story basically I’m a bass head and I wanted a sub in my jeep so I took the kicker sub and amp I had in my truck and put it in my Cherokee unfortunately we did not reconnect the cable that travels from the alternator to the battery bus bar however the cable was on the post, the first sign of the problem occurred when the stop/start system was disabled shortly after driving away. I thought this was because the car detected the subwoofer was now drawing power so it disables the system so I ignored it. We did all this on Saturday evening and everything was going smooth, Until “Wednesday” came around. So I’m driving to work on the interstate in the first three warnings that came appeared were ABS, Stability Control, and my parking brake were all disabled. Forgot to mention my card did start mentioning something about a low power state but I didn’t know what that was about but now I know; Anyways I stop at a red light, and things start to get real problematic first my AC starts turning on and off and then my head unit blacked out. I put the card in park because I didn’t know what was going on. I opened the back of my jeep manually as the Rear powered door is also disabled. I glance over at my Subwoofer Amp (Kicker 800.1) and I see two lights on at the same time power and protect meaning the voltage in my car battery was below 10 1/2 V and I verified that with my multimeter as I work with AC units so I jumped my car battery off with a little bit of voltage from the pack and I was able to quickly get to work in the afternoon. It turns out I did not reattach the nut nuts for the battery lead meaning the car battery was never truly charging. If you’re thinking about buying a cheaper, one of these, you might want to stick with this brand as they are very reputable charge very quickly through USB-C power delivery, which is very handy. It is in my opinion the safest jump pack as you cannot short the output unless you override the pack, which I have done before sorry about that Noco, but I had to experiment. Sheep was work, but they’re usually made with cheaper batteries so they don’t hold a charge very well and they die pretty quickly so it might be only good for six or seven cranks. This jump pack also has many safety features and temperature protection. And it has a flashlight. I don’t know what else to say but I strongly recommend buying this jump pack. It’ll save you when you’re in a jam and it saved me from being stuck at a green light. ... show more
Reviewed in the United States on April 27, 2025 by Trevor Ames
    • Great value
Great to have on hand for emergencies. Holds a charge well and will jump anything. Great value for your money
Reviewed in the United States on November 4, 2025 by Amazon Customer
    • I almost sent this back to Amazon
I've been having to jump start a car every few days because I need to move for street sweeping. It's been going good and this unit started it every time without fail. Well, that was until today. The battery was totally dead. I connected this unit and saw that the lights were racing or moving, but when I turned the key, not thing happened. Even tried to jump start it from another vehicle. So I went back to my desk and started searching for something with more oomph. I started watching the video on the new product I was going to replace this one with because it has a feature called boost. Then I went and watch the video of the unit I had which is called GBX45 Boost X. It has a button on it called override. So I went out to the car hooked it up, pressed override for a few seconds and voila! The car started very easily. I turned off the unit and the car died, but that battery didn't have enough time to charge, so I will hook up one of those trickle chargers tomorrow. Bottom line.... this is a great jump starter, once you read the instructions! ... show more
Reviewed in the United States on July 13, 2025 by Daddy DIY

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