A few weeks ago the rechargeable battery pack on two of my
Xbox 360 controllers decided to stop charging. After a few days of trying to recharge them I swapped them out for AA batteries and went on with my life. Yesterday, I was talking to ALow his battery pack was doing the same thing. After a bit of googling I found this
knowledge base article which describes some possible solutions for the battery pack problem. The document suggested to “us
e a cotton swab and some isopropyl alcohol to clean the four gold contacts on the Xbox 360 Rechargeable Battery Pack and on the Xbox 360 Wireless Controller.” After cleaning both controllers and batteries they charge perfectly. When I shut down the console the one of the lights on the controller was dimly lit. So once again
google turns up this gem. According to the post to turn off the light and to avoid draining the battery take the battery pack out and put it back in. Brilliant. And of course it works.