What to do if the screen doesn't show 'READY' icon when jump start a car.

Answer:

HULKMAN products are designed for every customer to use easily and safely. The Alpha products are the most advanced products in the market, designed with multiple built-in protections and a smart screen for our customers’ easy use.

If you don’t see “READY” icon on the screen, and the Battery Level icon is flashing, then your battery level is too low to start a car:

If you see 'Error Code' on the screen, please check the below link:

• What to do if the screen shows 'Error Code 1'.

• What to do if the screen shows 'Error Code 2'

• What to do if the screen shows 'Error Code 3'

• What to do if the screen shows 'Error Code 4'

If you see nothing on the screen (neither the 'READY' icon or the 'Error Code' icon), you might need the Force Start function.

If the voltage of your vehicle battery is extremely low, then the jump starter will not recognize it as a vehicle battery. Please try to use the Force Start function.

Preparation: check your battery level

Make sure that the jump starter battery level is at least 20%.

But we recommend you charge it to 80% or fully charge it.

Note: Even though our product can restart dead batteries when the battery level of the jump starter is 20%, we still suggest you recharge the jump starter to above 80% for the best performance. When starting a completely dead battery, the car engine requires more power.

4 Steps to use the Force Start Function

Step 1: Insert the battery clamps into the jump starter and attach the clamps to the car battery (The screen may display the “Error Code 2” message or won't display any instructions).

Step 2: Press the Power Button and Flashlight Button simultaneously for 2–3 seconds to start the force output.

Step 3: Start the car engine.

Step 4: Remove the clamps from the car battery.

Warning: Please be cautious when using the Force Start Function as the auto-detection and safety features will be disabled. Ensure that you have a proper connection.

If you still need assistance, please contact us:

If you have checked the connection, there is no Error Code on the screen, and you still can't start your vehicle with our product at over 80% battery power, please contact our customer support at service@hulkman.com with the following information:

1. Order number
2. The serial number of your product (Where can I find the serial number?)
3. Your vehicle model
4. Any image or video for proof of the issue (If applicable)

Our agent will help you troubleshoot your issues, with the guarantee of an exemplary experience.