As per title, I bought my Macbook Pro Unibody in 2009. The battery has 184 Cycles. Since upgrading to Lion the battery now shows "service battery" and the computer shuts off approaching 20% battery remaining. I thought it was a Lion issue, but I can't see how it can be? My question is, is this a normal amount of time to have to replace a battery? Should I be annoyed and contact apple? Many thanks!