I know my Isis says to leave it on the charger all the time, and I believe reviews of the Chandra have said the same thing. I'd double check the pamphlet, or you can message people who have written reviews on Chandra and ask them to double check theirs. But otherwise I think it'd be fine. Most things have a limit of 24 hours that they shouldn't be left on the charger
It's been my experience not to continually charge batteries, unless they get weak and won't hold a charge. Charge as indicated then remove from charger. Every once in a while run them all the way down, then charge immediately.