I've yet to have it actually show me the "battery full" icon or message on it's own UNTIL I tap the battery icon with the charger in and then it will.

Also, I forgot - as I usually do - that when I re-flash it sets the Bluetooth to discovery mode which seems to destroy batteries. I've a desk charger and two extras and went through all three in a day, until I turned that off after adding my keyboard - now it lasts into the night.