I have a 15" Macbook Pro. For the past week the charger would sporadically stop working and randomly start working up again. Today, after an hour of trying, nothing would get it to work. I had even tried cleaning the area where the charger inserts into the Macbook with a q-tip but no use. Could this be because under my battery it says it must be "replaced soon" or is it just time to get a new macbook charger?