i have the Dreamgear 4-controller charger. there are 2 things i hate about it. (1) if i go about a week or 2 without using a controller, the charge is gone. (2) if i have to resync, i can't, because the battery is connected to the cover. does anyone have any suggestions between the other 2 available chargers? Nyko and Energizer. i saw a picture of the Nyko one on Amazon that shows the battery connected to the cover, but i'm not sure if it's just laying with it. any feedback would be much appreciated.