Received this trimmer and went right to the instruction book. (I learned to check this out first) Don't recharge this NiCad Battery unless its totally discharged because you will damage the battery by recharging every time you use it and don't leave it plugged in either. Just charge it when it quits that is all!! Took a little looking to find the rotating ring that sets the height (or depth) of the hair but it works fine. I found that I look better if I use two heights for different areas. I like the two speed and I Love the vacuum for not leaving hair everywhere. After using it I can't imagine using anything that does not clean up after itself (vacuum that is) I am very satisfied.