I have had the Trophy Red dot on my 835, for 10 years now, and I haven't had a single problem (Knock on Wood). I change my battery every spring, not necessary, but good insurance. After the season is over, when I clean and put up the gun, I take the battery out so there isn't any accidents in the battery compartment. For about $3, great insurance. Tracker, contact Bushnell with the problem, I've always had Great customer service from Bushnell (and I have several of there scopes, binos and rangefinder).