hey good news! I tested it with a nickel like you said and it came out to 5g. Then curiosity got the best of me and I got him out and tried it again. (he was really mad at me! lol especially since i tried it back and fourth with the nickel and him and the nickel made a loud clank noise in order for me to put it on the glass without applying weight) It read consistently as 271g when I put him on it.