It would be a really poor piece of design if you had to keep track of how many times or how long it was in the cradle! I see the cradle as somwhere to store it when not in use, so I know just where to find it, and it's always ready to go.

If there was any chance of problems through leaving it in the cradle too long, I'd expect a clear warning - but the remote or cradle should be able to handle all that quietly by themselves.