I bought a MacBook about a week and a half ago (Week 30) and just recently have had troubles with my battery. For the first week and a half it worked great. 4 to 4.5 hours with usual web browsing. Last night I got about an hour and a half MAYBE out of a full charge. I fully charged it again and ran Coconut Battery and was down to 19% of the original charge. Advice, opinions, good looking girls phone numbers would all be welcome.