Leupold RXB-IV Binocular Rangefinder

well, I have two questions I was hoping you could provide some information.
1. Why did Leupold stop making RXB-IV hunting rangefinder. I have one, was very happy with it. 
2. One I have seems to have a problem, drains battery extremely fast, ie. can’t take more than 5-6 readings with a fresh battery. Can they be serviced/fixed?
Thanks.