Model Number: JNC345

JNC345 550 Start Assist Amp 12 Volt Lithium Jump Starter

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The JNC345 is an ideal shop tool for servicing light duty and medium duty vehicles, combining extreme jump starting power with numerous features that deliver utility and convenience, including high performance starting capability, USB outlets to power small electronics, 12 Volt power supply capability, an LED work light and UL2743 compliance for operator and equipment safety.

With 550 Start Assist Amps of starting power, the JNC345 can tackle a wide variety of starting tasks in numerous application environments, including automotive, marine, light truck, agricultural and fleet starting. It can start up to 10L gasoline engines and up to 10L diesel engines. Plus, it features the ability to jump start totally dead (0.0V) batteries – simply confirm that you have made a proper connection and press and hold the override button to force the unit on. It’s that easy.

It also incorporates numerous features to make jump starting safer for the operator and vehicle being serviced, including reverse polarity protection, backfeed protection, over-voltage protection, short circuit protection and overheat protection. It features safety certification by TUV laboratories to comply with the UL2743 lithium jump starter safety regulation.

The JNC345 adds several convenience features to extend its capabilities. It features two USB outlets to power cell phones, tablets and other small electronics. Also included is a 12 Volt Female Adapter, allowing the JNC345 to power accessories from its 10A DC outlet or be used as a memory saver when changing out a vehicle battery. It features a high intensity LED work light for use in nighttime starting or other emergency situations. Charging is easy with the included AC charger wall charger with cord and a fast, automatic charging routine. The unit comes packaged in a convenient storage case for easy transport and storage.

  • 550 Start Assist Amps
  • Full Size Clamps
  • 40" Cable Reach
  • #6AWG Output Leads
  • LED State-of-Charge Display
  • Dual USB Outlets to power electronics
  • 10A DC Pinjack Outlet to power accessories
  • Automatic Charging
  • Built-in LED Flashlight
  • Repair Service Coupon
  • Zipper case for secure storage
  • 1 Year Limited Warranty


  • 12 Volt Start Assist Amps : 550
  • Cable Length : 40″
  • Cable Gauge : #6 AWG
  • Charge Type : Automatic
  • Override Feature : Yes
  • Reverse Polarity Protection : Yes
  • Backfeed Protection : Yes
  • Over-Voltage Protection : Yes
  • Overheat Protection : Yes
  • Indicator Display : LED State-of-Charge Display
  • USB Outlet : 2 (2 – 2.4A)
  • DC Outlet : Yes (10A)
  • Certifications:  Conforms to UL2743
  • Weight : 6.2 lbs.
  • UPC : 010271027132
  • Warranty : 1 Year Limited

JNC345 Operator’s Manual

JNC345 Information Sheet

Additional information

Weight 6.2 lbs
Dimensions 13 × 6 × 6 in