I have replaced my charger at least four to five times. Why does it continue to stop working? Is it the computer or the charger itself? Also, not I have a new one and it's plugged in but the battery percentage at top of screen continues to say 0%. I ordered the last two chargers from Amazon. I don't understand why Apple can't manufacture a charger that will last the life of the computer. The first two chargers were from Apple and did not last any longer than the ones from Amazon so I don't believe that it must come from Apple.