I have been told that some Li-Ion batteries go int a deep discharge state if left flat for too long. One would hope, Ernie, that you will sell your remote before this has a chance to happen after 2 years or more. And that they can sometimes take upto 10 times their normal charge time to cop a full charge.

But I also try to keep my Li-Ion batteries charged up as much as possible. If it's never left to go flat, it will never be flat. Within reason of course.