I give 4 stars because the battery is fixed in the device. When the battery is def one has to return the device. Otherwise I like the screwdriver very good. It is very easy to use and it is very much accessories here. The device is suitable for screwing on PC or Scheibengardienen attach etc. It is very convenient that lets the handle is adjustable by rotating. You can reach well into hard to reach corners. I recommend this device.