I've had mine a little shy of a year and really enjoyed it except for the last 2 months. All of a sudden it's having a hard time picking up the right distances and there's serious battery drain happening on my unit. When I charged it two times ago, it only lasted about 10 rounds. Then I recharged it last week and it lasted three rounds, and when I pulled it out today it was 100% drained. Sucks big time! I'll try to work with them to get a new one, but until then I'm going back to a replaceable battery version.