Review on KONNWEI KW510 12V 5-Amp Smart Charger with Car Battery Tester - 3 in 1 Automotive Pulse Repair Maintainer, Trickle Charger Battery Desulfator with Temperature Compensation by David Carmody

Great tool. As with any tool, you need to know how to use it properly. I say this because many people post bad reviews without knowing how to use the tool properly. I have other chargers and diagnostic equipment because I work with cars and trucks all the time. In my opinion, everyone who works with cars should have one of these. It's packed with features, and the display and menus are easy to read and understand. I just bought it a few days ago and it has been used 24/7. It tests the alternators and starters on the vehicle and can diagnose, repair and charge the battery to keep it at peak performance. This item pays for itself the first time you use it!