Explore the latest Back to School techShop now

Skip to contentGo to Product Search
Main Content

NOCO - Boost X GBX45: 1250A UltraSafe Jump Starter – 12V Portable Lithium Battery Booster Pack – 6.5L Gas & 4.0L Diesel

Model: GBX45
SKU: 10365006
Sold & shipped by

About this product

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.

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.

See all features
Specifications
  • Brand
    NOCO
    Model Number
    GBX45
    Product Name
    NOCO Boost X GBX45: 1250A UltraSafe Jump Starter – 12V Portable Lithium Battery Booster Pack – 6.5L Gas & 4.0L Diesel
    Amperage
    1250
    Voltage
    12V
    Compatible Battery Type
    Lead acid, Lithium-ion
Sponsored

Reviews

Rating 4 out of 5 stars with 4 reviews

5 star rating. 3 reviews1 star rating. 1 review
75% would recommend to a friend

The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.

  • Rated 5 out of 5 stars

    What a boost!!!

    Love this car booster. Small compact and easy to carry around. I do have a small compact sports car and this does great when starting it.

    Posted by VincentW

  • Rated 5 out of 5 stars

    Security and More

    This is a high quality jump starter that's ready when you need it. You can also charge your devices from it too!

    Posted by TimC

  • Rated 1 out of 5 stars

    Does not work

    The item does not work. Lights up but does not charge battery. Best Buy will not refund it and neither will NOCO. States it is pass the 15 day return window but NOCO has a 30 day return window on their website.

    Posted by CARMAN

  • Rated 5 out of 5 stars

    Excellent portable and ready to go!

    A must have in all your vehicles for peace of mind and safety

    Posted by jam36a

Compare similar products

NOCO - Boost X GBX45: 1250A UltraSafe Jump Starter – 12V Portable Lithium Battery Booster Pack – 6.5L Gas & 4.0L Diesel
NOCO - Boost X GBX45: 1250A UltraSafe Jump Starter – 12V Portable Lithium Battery Booster Pack – 6.5L Gas & 4.0L Diesel
4.0(4)

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.

WOLFBOX - 4000A Car Battery Jump Starter, Portable Battery Booster, Fast Charger, Jump Box for 10L Gasoline and Diesel Engines

This WOLFBOX JS24 car jump starter provides up to 4000A peak current and 24000mAh high capacity. It can safely start gas and diesel engines. Works on all (12 volt) cars, trucks, boats and large vehicles, meanwhile it is very portable. The JS24 battery jump starter works with a smart jumper clip to provide 10 safety protections to ensure safe use. The JS24 car jump starter power supply contains an LED screen that clearly displays all status indicators of the portable car jump starter power supply. You can easily identify the current status of your emergency power source and provide seamless access to all functions. This JS24 car jumper is also equipped with 1*65W Type-C input/output port and 1*QC 3.0 USB-A port, which can save 50 when charging your mobile phone, tablet, Kindle or digital camera 50% time. Tips:A 65W charging plug needs to be purchased separately.

NOCO - Boost GB40: 1000A UltraSafe Jump Starter – 12V Portable Lithium Battery Booster Pack – 6.0L Gas & 3.0L Diesel
4.7(7)

The NOCO Boost GB40 is a compact yet powerful 1000-amp lithium jump starter designed to safely jump start a dead car battery in seconds—perfect for cars, trucks, motorcycles, ATVs, boats, SUVs, vans, and more. This portable car battery jump starter delivers up to 20 jump starts on a single charge and is rated for gasoline engines up to 6.0 liters and diesel engines up to 3.0 liters. Engineered with UltraSafe Technology, it features spark-proof connections and reverse polarity protection, making it a safe and mistake-proof car battery booster for any 12-volt vehicle. It doubles as a portable USB-C power bank for charging smartphones, tablets, and other devices when it matters most, and includes an integrated 100-lumen LED flashlight with seven light modes, including SOS and emergency strobe—ideal for night use, roadside visibility, or emergencies. With an ultra-compact, rugged design, IP65-rated enclosure, and rubberized over-molded casing, this battery jump starter pack is built tough to withstand water, dust, drops, and rough handling. The GB40 includes heavy-duty jumper cables, a USB-C charging cable, and a microfiber storage bag, all backed by a 1-year warranty and proudly designed 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 GB40 delivers unmatched performance, trusted durability, and peace of mind—on the road, off the grid, or wherever your next adventure takes you.

NOCO - Boost GB70: 2000A UltraSafe Jump Starter – 12V Portable Lithium Battery Booster Pack – 8.0L Gas & 6.0L Diesel
4.8(12)

The NOCO Boost GB70 is a compact yet powerful 2000-amp lithium jump starter designed to safely jump start a dead car battery in seconds—perfect for cars, trucks, motorcycles, ATVs, boats, SUVs, vans, and more. This portable car battery jump starter delivers up to 40 jump starts on a single charge and is rated for gasoline engines up to 8.0 liters and diesel engines up to 6.0 liters. Engineered with UltraSafe Technology, it features spark-proof connections and reverse polarity protection, making it a safe and mistake-proof car battery booster for any 12-volt vehicle. It doubles as a portable USB-C power bank for charging smartphones, tablets, and other devices when it matters most, and includes an integrated 400-lumen LED flashlight with seven light modes, including SOS and emergency strobe—ideal for night use, roadside visibility, or emergencies. With an ultra-compact, rugged design, IP65-rated enclosure, and rubberized over-molded casing, this battery jump starter pack is built tough to withstand water, dust, drops, and rough handling. The GB70 includes heavy-duty jumper cables, a USB-C charging cable, and a microfiber storage bag, all backed by a 1-year warranty and proudly designed 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 GB70 delivers unmatched performance, trusted durability, and peace of mind—on the road, off the grid, or wherever your next adventure takes you.

Pros for NOCO - Boost X GBX45: 1250A UltraSafe Jump Starter – 12V Portable Lithium Battery Booster Pack – 6.5L Gas & 4.0L Diesel
There were no pros for this productOverall Performance, Ease of Use, Charging Speed, Size, Battery LifeOverall PerformanceOverall Performance

Specs

Questions & Answers
  • Can I use it on a hybrid vehicle?

    Yes, the GBX45 is compatible with most hybrid vehicles. We recommend checking with your dealership for more information on jump-starting your vehicle.

    Answered by NOCO Product Expert
    NOCO Product Expert response
  • how do i charge up the Boost X..GBX45 1250A iin order to jup my car?

    A USB-C compliant charger is needed to achieve the fastest charge possible for the GBX. The U65 is the NOCO brand fast charger. Non-NOCO chargers must exactly match the USB-C compliant specs listed below for the fastest charge: 5V @ 3A (15W) 9V @ 3A (27W) 12V @ 3A (36W) 15V @ 3A (45W) 20V @ 3A (60W) - Fast Charge LED illuminated If the charger does not follow the standards above, even if it is branded as a ""fast charger,"" the GBX will default to charging at 5V and a slower charge rate.

    Answered by NOCO Product Expert
    NOCO Product Expert response
Ask a question
No content
Sponsored

Finance Options

My Best Buy® Credit Card
Buy Now, Pay Later

Finance Options

My Best Buy® Credit Card
Buy Now, Pay Later