Tom, you say “First it reads the angle every second or so, which can get frustrating whey you are trying to approach a meet point. It is not constant reading. Also, it is battery powered and when the battery charge gets below 50%, it starts giving you erroneous information. ”
Mine certainly appears to be constant reading. It certainly isn’t every second or so. I wonder if Gearloose would comment on this.
The battery does have to be changed occasionally, but for my usage, it’s about once a year, and much less with a lithium battery. Also, it doesn’t really give you erroneous information, it just starts getting jittery, making it quite obvious that the battery need changing.