I did some school work on my laptop and got the battery all drained. I tried to charge it. First it charged perfectly. I used it again and the battery drained to 10% .I charged it but there is no light indicator or on the screen signal. I drained it more to 0%(as to the community said I should do) then it started charging. What's happening on my laptop? is the battery broken or the charger? or is this normal?