I have a UB MB, which I upgraded to a 4GB RAM, and a 500GB HDD. i personally opened the machine to stick in the new RAM and the HDD. When I did that, the battery popped out with little effort by tugging on the little plastic tab. The other day I wanted to remove the battery again, but it seems to be totally stuck. I ripped the plastic tab out tugging at it, and even using a small screwdriver for leverage doesn't budge it. What happened, how did it get stuck? What can I do to take it out? It is still fine now but at some point I'll have to change it. Any idea how to take it out?