Here is my long winded story: My computer (macbook 13, 2008) started having issues recognizing when it was plugged into the ac charger...initially I thought it might be a battery issue (I now have a stockpile of new batteries\) but I started seeing a pattern in the chargers. The original charger lasted about a year before it died (no light, computer not recognizing its plugged in, not charging) and I got a new one. Charger #2 lasted about 6 months, charger #3 lasted...