We just bought our daughter a new SP2 from Best Buy last week. We took it to her when we visited her college yesterday. She tried to charge it overnight and it read "Battery Not Detected" this morning. We tried to do all that the Microsoft site said to do to no avail. Took it back to another Best Buy (not in the same city) and replaced it with another new one. Tried once again and this one is saying the same thing! It is extremely frustrating to have two brand new tablets have such issues. We have looked at the Microsoft site till our eyes are blurry and have tried as much troubleshooting as we know how. I am ready to just take this one back, call this a bad decision on a new tablet for her and go for another brand. We liked the SP2 because it was so similar to her laptop and thought she would find it easier to use. Well, she can't use it in class if it doesn't charge.....Any help would be much appreciated!