I'm certainly no authority on batts but I always allow a little cool down time before and after charging.(not 24hrs. though)
Always check for heat. Heat is not a good sign and easy to recognize.
First use is always away from my mouth/body, for a test fire, usually a battery level check.
It's most likely if the battery is going to be a problem it'll happen on the charger or first use after charging(from what I've read).
Cheers!

