I have never worried too much about when to charge. I just charge it at night. Every night. I use it during the day. My dock battery is starting to lose life, I would say it only has 60-70% of its original capacity but the tablet battery is still strong. Just watched 4 episodes of Boardwalk Empire on a flight from Paris to Boston, brightness a 5 in MX Player, BT, WiFi and GPS off, battery went from 96% down to 49% after 4 hours of video watching (undocked).
ASUS Transformer 16GB with Keyboard Dock - Munching on Jelly Beans
crApple iP*one 5 - Stock
Just once I want someone to call me Sir without adding you're making a scene.
- Homer Jay Simpson