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NOCO Boost X 12v 1250 Amp Ultrasafe Lithium Jump Starter

Was: $159.95
Sale Price: $124.95
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Product InformationStore Part Number: GBX45


The NOCO Boost X GBX45 is a 12v 1250-Amp UltraSafe Lithium Jump Starter. The GBX45 can operate in cold weather as low as -4°F and in hot weather as warm as 122°F. The GBX45 is designed to start gas vehicles with an engine size up to 6.5L and diesel engines up to 4.0L.

The GBX45 features fast USB-C charging technology when using a USB-C 60 Watts charger*. This fast charging technology will allow you to charge the lithium battery pack within 48 minutes. The fast recharge time also allows the unit to go from a 0% charge to jumping a vehicle in as little as five minutes.

The GBX45 features spark-free hookup technology and Reverse Polarity Protection! For Excessively discharged batteries below 3-volts the GBX45 features a Manual Output. This mode forces the GBX45 to output allowing you to start the engine when connected to an excessively discharged battery.

What's Included:

  • GBX45 Lithium Jump Pack
  • HD Precision Battery Clamps
  • 24" USB-A to USB-C Cable
  • Microfiber Storage Bag


  • Rated at 1250 Amps!
  • Designed for gas engines up to 6.5L and diesel engines up to 4.0L.
  • Fast USB-C Charging Technology: From 0% charge to starting a vehicle in as little as 5 minutes!
  • Automatic Power Saver: 60-second safety timer requires you to jump the vehicle within 60 seconds. Should additional jumps be needed the unit can be reset.
  • 1-Year Warranty


*Charging time will vary depending on charging brick used. Charging brick is not included, USB-C compliant recommended by manufacturer. The GBX45 will timeout if charge hasn't been completed within 12 hours at which point you can simply disconnect and then reconnect the charging cord. Please see the following guide for estimated charge times:

Recharge Time    Charger Rating  
16-Hr 2.5 Watt
8-Hr 5 Watt
4-Hr 10 Watt
.8-Hr 60 Watt

Tech Specs

  • Dimensions (LxWxH): 6.83 x 3.28 x 2.08 in
  • Weight: 2.16 lb
  • Shipping Weight: 4 lb
  • DC Output System Voltage: 12v
  • Safe For: Lead-Acid Batteries
  • Model: GBX45
  • Manufacturer: NOCO
  • Starting Current: 1250 Amps
  • Capacity: 31 Wh
  • Operating Temperature: 4ºF to 122ºF
  • Charging Temperature: 32°F to 104°F
  • Warranty: 12 Month
  • Manufacturer Part #: GBX45
  • UPC: 046221200065
  • Made In: Maylasia

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Specification Sheet

Order Line: 1-800-362-5397
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Tech Help: 541-474-4421
Fax: 541-471-6014
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Grants Pass, OR 97526