⚡LXT Cordless battery for emergency Car Starter, is it Legit ?

I've seen videos and comments about using a power tool battery to jump start a car. Coincidentally, I have a 5-year-old weak car battery. To make it clear, I left the headlights and foglights on for a couple of hours to deplete the battery. Now, with only 11 volts, the car battery can't start the car at all. Will a 21-volt LXT "fake Makita" help the car in an emergency situation? Fake or Legit? I've seen videos or comments claiming that a 21-volt power tool battery, like an impact wrench or cordless drill, can be used in an emergency to jump start a car. Coincidentally, my 5-year-old car battery was weak, so I used it as a test. To make matters worse, I deliberately drained the battery by turning on the headlights and fog lights for several hours. With only 11 volts left, the battery was no longer able to start the engine. Is it true that an LXT drill battery can be used for emergency car starting? Whether it's true or a hoax, we'll prove it in this video experiment. 0:00 Explanation of the video's purpose 0:20 Preparing the LXT drill battery 1:17 Headlights for draining the battery 1:34 Battery condition after draining the battery 2:19 Starter test before jumper 2:41 Jumper car battery with a 21-volt LXT Makita battery 4:46 15 minutes later 5:42 Starter test 1 6:46 Starter test 2 7:16 Starter test 3 7:41 Conclusion