Product(WX854) 12V COMPACT JUMPSTARTERBoth the red and green light are off, and there is no beep when trying to jump start a car
(WX854) 12V COMPACT JUMPSTARTER

Both the red and green light are off, and there is no beep when trying to jump start a car

Try this solution

Make sure that the positive and negative poles are connected correctly

Once they are, push the BOOST button on the Jumper Cable. After the green light stays on, complete the startup within 30 seconds. Turn the ignition switch to the START position. After the vehicle starts, remove the battery clip.

If this doesn’t work, the battery may be damage.