LOKITHOR JA400 Jump Starter with Air Compressor

Manufacturer: ‎LOKITHOR
Model Number: ‎JA300

User Manual for LOKITHOR JA400 Jump Starter with Air Compressor

Getting Started

  • Ensure your LOKITHOR JA400 Jump Starter is fully charged before first use.
  • Read all safety instructions and warnings provided in the manual to avoid injury or damage to the device.

Jump Starting a Vehicle

  1. Make sure the jump starter battery level is above 50%.
  2. Turn off all electronics in the vehicle, and ensure the vehicle is in park or neutral with the parking brake engaged.
  3. Connect the red clamp to the positive (+) battery terminal and the black clamp to a grounded metal component on the vehicle's frame.
  4. Power on the JA400 jump starter.
  5. Attempt to start the vehicle. If it doesn’t start immediately, wait a few minutes and try again.
  6. Once the vehicle starts, carefully disconnect the black clamp first, followed by the red clamp.
  7. Keep the engine running to recharge the vehicle's battery.

Using the Air Compressor

  1. Attach the appropriate nozzle adapter to the inflatable hose.
  2. Connect the inflatable hose to the tire valve.
  3. Power on the JA400 and select the desired pressure unit (PSI/BAR).
  4. Set the desired tire pressure using the '+' and '-' buttons.
  5. Press the start button to begin inflating. The compressor will automatically stop once the preset pressure is reached.
  6. Disconnect the hose and store the unit appropriately.

Charging Electronic Devices

  1. Connect your device's USB cable to the appropriate USB-A or USB-C output port on the JA400.
  2. Power on the jump starter to begin charging your device.

Using the LED Light

  1. Press the LED light button to toggle between Normal, Strobe, and SOS modes.
  2. Press and hold the button to turn off the light.

Troubleshooting Tips

Jump Starter Won't Charge
Ensure that the USB-C cable is properly connected and that the power source is on. Try using a different cable or power source.
Vehicle Won't Start
Check that the clamps are securely connected, the battery level is sufficient, and that you are following the jump-starting procedure correctly.
Air Compressor Not Working
Ensure the hose is securely attached to both the jump starter and the tire valve. Check for any obstructions or leaks in the hose.
LED Light Not Functioning
Verify that the jump starter has enough battery power. If the LED still does not work, the bulb may need replacement.

Frequently Asked Questions (FAQs)

How long does it take to fully charge the JA400 jump starter?

The JA400 jump starter can be fully charged in approximately 40 minutes with a PD 60W USB-C power delivery input.

Can the JA400 jump starter start any vehicle?

The JA400 is capable of starting 12V vehicles up to 7.5-Liter gasoline or 5.5-Liter diesel engines.

Is it safe to leave the JA400 plugged in all the time?

It is not recommended to leave the jump starter plugged in constantly. Once fully charged, unplug the device to preserve the longevity of the battery.

What safety features does the JA400 have?

The JA400 includes 10 safety protection technologies, such as over-charge, over-current, and short-circuit protection, to ensure safe operation.

How many times can I jump-start a vehicle on a single charge?

The number of jump starts per charge can vary based on the condition of the vehicle's battery and other factors, but typically several jump starts are possible.

Can I use the JA400 to inflate bike tires?

Yes, the JA400 can inflate bike tires using the appropriate nozzle adapter included with the product.

What should I do if my JA400 is not working properly?

Refer to the troubleshooting tips provided in this manual. If the issue persists, contact LOKITHOR customer service for assistance.

How do I know when the air compressor has reached the preset tire pressure?

The JA400 air compressor will automatically stop inflating once the preset pressure is reached, ensuring your tire is not overinflated.

What is the weight and size of the JA400?

The JA400 weighs 1950 grams and has dimensions of 5.57"D x 9.99"W x 4.07"H, making it portable and easy to store.

How do I switch between different pressure units on the air compressor?

You can switch between pressure units (BAR/PSI) by pressing the unit button on the digital display of the air compressor.

Can the JA400 charge laptops?

Yes, the JA400 can charge laptops that are compatible with USB-C PD 60W charging.

What do I get in the box with the JA400?

The box includes the JA400 jump starter, jump starter clamps, inflatable hose, nozzle adapters, USB-C cable, accessories storage bag, and a user manual.

FAQ [continued]

Q: What is the peak current of the LOKITHOR JA400 1750A Jump Starter?
A: The LOKITHOR JA400 Jump Starter is equipped with a peak current of 1750A, allowing it to instantly start 12V vehicles with engines up to 7.5 liters for gasoline and 5.5 liters for diesel.

Q: Does the JA400 Jump Starter come with a digital cordless air compressor?
A: Yes, the JA400 Jump Starter includes a digital cordless air compressor that can provide a maximum pressure of 150 PSI and an airflow of 35L/Min. It also supports tire-pressure detection, preset values stopping, and unit switching (BAR/PSI).

Q: How long does it take to fully inflate a car tire using the JA400 Tire Inflator?
A: The JA400 Tire Inflator can fully inflate a 195/65/R15 car tire from 0 to 35 PSI in just 5 minutes.

Q: Can the JA400 battery pack be charged quickly?
A: Yes, the JA400 battery pack features PD 60W USB-C power delivery input, allowing it to be fully charged in just 40 minutes. Additionally, only 5 minutes of charging time are enough to start a car.

Q: Is the JA400 Jump Starter safe to use?
A: Yes, the JA400 Jump Starter is built with 10 safety protection technologies, including over-charge, over-current, short-circuit, reverse-polarity, low-temp, high-temp, over-voltage, over-load, spark-proof, and reverse-charge protections. It also intelligently identifies faults with its 21 error codes.

Q: Does the JA400 Jump Starter have a unique heat dissipation design?
A: Yes, the JA400 Jump Starter features a unique heat dissipation design with three large heat dissipation air outlets (2 sides + 1 bottom). This design improves the heat dissipation performance by 75%, extending the continuous running time and service life of the jump starter.

Q: Can the JA400 Jump Starter be used for more than just starting a car?
A: Yes, the JA400 Jump Starter has USB-A (QC3.0 18W) and Type-C (PD 100W) outputs, allowing it to charge smartphones, tablets, laptops, wearables, and more. It also includes a lithium battery booster LED light with three modes: Normal, Strobe, and SOS.

Q: What is included in the package of the JA400 Jump Starter?
A: The package includes the JA400 jump starter, jump starter clamps x1, inflatable hose x1, nozzle adapters x4, USB-C cable x1, accessories storage bag x1, and a manual.

Q: Is the JA400 Jump Starter a good gift option?
A: Yes, the JA400 Jump Starter can be a great gift for various occasions such as birthdays, Valentine's Day, Father's Day, Mother's Day, wedding anniversaries, Christmas, and New Year's.
Safety Information (PDF)
Safety Information (PDF)
Specification Sheet (PDF)
Specification Sheet (PDF)
Troubleshooting Guide (PDF)
Troubleshooting Guide (PDF)
User Manual (PDF)
User Manual (PDF)


Model Number‎JA300
CategoryAutomotive Parts & Accessories > Automotive > Tools & Equipment > Jump Starters, Battery Chargers & Portable Power > Jump Starters
Product Dimensions‎5.57"D x 9.99"W x 4.07"H
Item Weight‎1950 Grams
Amperage‎1750 Amps
Peak Output Current‎1750 Amps
Model‎JA Series
Item Weight‎4.3 pounds
Country of Origin‎China
Item model number‎JA300
Batteries‎1 Lithium Polymer batteries required. (included)
Manufacturer Part Number‎JA300
Bulb Type‎LED(Flashlight/Strobe Light/SOS Light)
Special Features‎150 PSI Tire Inflator, Supports Tire Pressure Detection/Preset Charging and Stopping Values/Unit Switching, USB-C PD 60W Two-way Fast Charging, 400-lumen LED Flashlight, Constant Light, Flash and SOS, 1750A Portable Lithium Car Battery Jump Starter
Lift Type‎Electric Power
Customer Reviews4.5 4.5 out of 5 stars 170 ratings 4.5 out of 5 stars
Best Sellers Rank#42,724 in Automotive (See Top 100 in Automotive) #266 in Jump Starters
Date First AvailableAugust 3, 2022
Product Dimensions5.57"D x 9.99"W x 4.07"H
Item Weight1950 Grams
Amperage1750 Amps
Peak Output Current1750 Amps
Weight1950 Grams
Dimensions5.57"D x 9.99"W x 4.07"H
First AvailableAugust 3, 2022

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