Yes, the small lithium jump starters really work. They are one of the most reliable and affordable ways to jump start your car. However, there are a few things you need to know before using one.
First, make sure that the clamps are properly connected to the battery terminals. Next, turn on the power switch and wait for the green light to come on. Once the light is on, press the boost button and hold it down for about 3 seconds.
If done correctly, you should hear your engine start within a few seconds. If not, try again or call for assistance.