The battery on my late-2010 MacBook Air doesn't last more than 10 minutes and the condition says "Replace Now" and as I understand it, late-2010 MacBook Airs are deemed obsolete at the end of the month. A replacement battery at the Apple Store is $129 but I see that these laptops are only selling for about $300. Should I even replace the battery or just wait it out until Apple announces new laptops?