I picked up this fantastic remote off ebay a couple months ago so I could control everything with one remote instead of having 2-3 remotes around and I have had to change the batteries 3 times already. Is this normal? Anyone with the RXV2200 or higher should have a similar remote. How long do your batteries last? Mine seem to last only about 2-3 weeks, and there are 3 AA batteries. This can get expensive.