Can any of you guys offer some tips on maximizing and preserving battery life on the Nevos? I'm getting the queasy feeling lately that one of my Q50s is either not taking or holding a charge as well as it used to. It can't quite get through a full day of use without a little extra quality time in the charging cradle. :(

So, I'm looking for somebody who knows more about these batteries than I do (that's probably all of you!) to offer advice on things like:

1. Should the battery be allowed to fully discharge occasionally?
2. Should the battery only be charged when it gets low?
3. Are short "booster" charges between nightly charges detrimental? (It goes on the cradle all night, every night.)
4. Are there any settings or usage suggestions that are best for battery performance?

One thing I noticed today was that the charge gauge would fluctuate a bit. It would show about 50% then go to 80% then back to 50% within a span of a minute or two. I've never seen this on the other Q50, but then that one doesn't get used nearly as much. Any thoughts on what this means?