This tool is unbelievable . It is way more capable than ME . i will spend some time on it to learn more of the unit function. (PS hobby mechanic DIY). Update on my review after about 6 months. For the peopple who have battery problem here ie the solution. To start i was using it wrong i was not powering off properly, the unit kept charge for less then 4 days after turning it off. My problem was i press briefly the power button, then the unit turn off. So here is proper way to power off properly, press and hold power button then on the screen appear POWER OFF click it. That will turn off unit properly. And battery will keep charge well over a month. Pressing briefly power is great for long use on vehicle, the unit then goes on stand by. Hope that will help every body that think the battery is defective. Now enjoy your new tool.