Search  for anything...
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
Condition: New
Checking for the best price...
$124.95 Why this price?
Memorial Day Sale · 22% off was $159.94

Buy Now, Pay Later

As low as $20.83 / mo
  • – 6-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product

FREE 30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Tuesday, May 26
Order within 14 hours and 36 minutes
Available payment plans shown during checkout
Protection Plan Protect Your Purchase
Checking for protection plans...

Recently Viewed

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


Battery Cell Composition: Lithium


Voltage: 12 Volts


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


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


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: Tuesday, May 26

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
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • 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

    • Great jump starter
Purchased this as we have many things that may require a jump start. It charges quickly and is very easy to hook up and jump start anything we need it for. It is a nice, compact size and comes with a carrying case. It works great and we would highly recommend it.
Reviewed in the United States on January 7, 2026 by Kris
    • It will Jumpstart a firetruck
Review Image by Lance Lance
Really impressed with this jumpstarter. I have owned this for a few years and have used it on various vehicles, it always works effortlessly. However a few weeks ago I had to put it to the real test. Our fire engine at my job had not been plugged in the night before and was reading around 7.5 volts on my meter, it wouldnt even turn over. It was a Sunday so no one was avaliable to come out and work on it. I figured I would give my noco a try. Our fire engine has an L9 Cummins with 4 giant batteries. I hooked it up and hit the boost button, waited a few seconds and started the truck. It fired right up! The noco had used about half of its battery and had the temperature light flashing for a while but it was able to do it. Once it cooled down it charged right back up. I wouldnt recommend doing this everyday with this sized battery, but it definitely has the beans to do it. ... show more
Reviewed in the United States on December 20, 2025 by Lance Lance
    • 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
    • Impressive!!!
Bought approximately 4 years ago and always worked when I needed it to. Reason I'm writing this now is to tell about the heartiness of the this thing. I charged it fully to take with me for an ATV trip Sept./Oct. 2025. No issues on the trip. Got back and accidentally forgot about it in the box on my machine until today. Got a call from my mom saying her vehicle wouldn't start after being outside in below 0 weather for close to a week. So I dug out the NoCo and brought it in the house for about an hour or so to warm up. Checked the battery level and had 3 of 4 bars. Good enough to attempt to jump start her V6 Jeep. Got to her place and hooked it up and no go. So I did the override delivering full amps and it started right up! I was shocked considering it has been almost 4 months of being outside but protected from the weather except temperature. I would definitely buy this 1 again! ... show more
Reviewed in the United States on January 29, 2026 by Spencer C
    • Compact, Powerful, and a Lifesaver in Emergencies
The NOCO Boost X GBX45 is a must-have for anyone who drives, providing reliable jump-starting power in a compact and easy-to-use package. I’ve used it to jump-start both a dead car battery and a truck, and it worked flawlessly each time—getting the engine running in seconds. With 1250A peak power, it’s capable of jump-starting up to 6.5L gas and 4.0L diesel engines, making it versatile for cars, trucks, motorcycles, and even boats. The UltraSafe technology ensures no sparks or accidental shocks, making it beginner-friendly. Beyond jump-starting, it’s also a USB-C power bank, which is perfect for charging phones, tablets, or other devices in an emergency. The compact design fits easily in a glove box or trunk without taking up much space. One small thing to note: Like all lithium jump starters, it needs to be charged periodically to be ready when you need it. If you forget, it won’t help in an emergency! And here’s a quick joke: Why did the jump starter never get lost? Because it always knew how to boost in the right direction! Overall, the NOCO Boost X GBX45 is a powerful, compact, and reliable jump starter that’s perfect for emergencies, road trips, and everyday peace of mind. It’s a great investment for any driver. ... show more
Reviewed in the United States on March 3, 2025 by Steven
    • 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

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...