In the world of laptop / notebook / netbook AC adapters, you gotta remember these three names: (1) Delta Electronics, (2) Lite-On, and (3) AcBel. Who are these three guys? Well ... all three are gargantuan manufacturers (we're talking quarterly sales well in excess of a billion US dollars), all three are based in Taiwan, they're the most likely designated manufacturer of your original (read: genuine) DELL, HP / Compaq, Lenovo / IBM, Sony, and Toshiba AC adapters, and their names/reputation are gold plated, and last, but not least, their position is so thoroughly dominant that all other players are vying for bits of crumbs.
For instance, when a company like Toshiba wants an order of, say, 6 million AC adapters from say, 2011 to 2012, they're gonna give Delta an order for 3 million units, Lite-On for 2 million, and AcBel gets a million units. Next year, they may switch it around and give 2 million each to the three companies, etc. etc. etc. No matter how the numbers are allocated , these three always get ALL of the orders. The reason is simple: Delta, Lite-On, and AcBel are gold-plated names, and they can walk and chew gum at the same time and require no adult supervision whatsoever. I trust them with my life.
And that's the lesson of the day: letting you guys know where these three manufacturers stand - cause you may or may not have heard of them. So when you're buying an AC adapter and you see the name Delta, Lite-On, or AcBel, you'll be smart enough to separate these three from all the other two-bit punks and be able to tell fact from fiction :-)