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Built for jump-starting heavy-duty equipment, the SJ1289 is perfect for engine starting robust batteries as well as providing AC power on the go. This unit offers an AC outlet, 4 USB ports plus an air compressor. It has a digital display indicating the charge level of the internal battery and voltage of the vehicle battery. It’s also safe and reliable, with a hook-up safeguard alarm that sounds if the clamps are improperly connected. The LED flex light provides lighting in dark conditions and can be set to continuous or flashing.


  • Max Reliability: Jumpstart your car or heavy-duty equipment reliably with 1200 peak amps; works with 8.0L gas and 6.0L diesel engines, 4-8 cylinders
  • Portable Power: Charge phones or tablets and power devices with AC, 12-volt DC, and 4 USB outlets
  • Easy To Use: A digital display indicates the charge level of the internal battery and the voltage of the vehicle battery
  • Safe And Reliable: Hook-up safeguard alarm sounds if the spark-resistant clamps are improperly connected; built-in LED flex light ensures you’re able to jumpstart your vehicle in dark conditions
  • Air Compressor: Add air to tires and sports balls with a 100 PSI automatic air compressor


  • Brand: Schumacher
  • Voltage: 12 Volts
  • Item Dimensions: 12.5 x 13.3 x 1.5 inches
  • Vehicle Service Type: Passenger Car
  • Item Weight: 22.75 Pounds
  • Batteries: 1 Product Specific batteries required
  • Amperage: 1200 Amps
  • Voltage: 12 Volts