Review on OptiMATE O-120: Weatherproof 12V Vehicle Charge System Tester with 6-LED Emergency Flashlight (SAE) by Jason Khadka

I thought I had a problem with the product but it looks like a fuse in the connection has blown. Boom removed and replaced everything works as it should. The 6 white LEDs were so powerful that they illuminated the building across from me. Very easy. You simply plug it into "weatherproof O1 permanent wire / fuse cable - POWER SPORT / fuse cable" and you're done. it will tell you automatically when the battery is low. As soon as you start the engine, you will also be informed whether the battery is being charged or not. I think it should be for people who need extra coverage for roadside emergencies.