Many laptops require you to use a ‘genuine ... it also allows the manufacturers to increase the price of their chargers. Dell uses the 1-Wire protocol to communicate with the charger ...

This article lists some fixes for the buzzing noise coming from a laptop charger when it is plugged in. Normally, laptop chargers do not make a noise while charging a laptop. However, some users ...

But, more interestingly, Dell also announced a totally different laptop with one major new feature ... $399 iPad mini, $8 MagSafe chargers, 30% off TurboTax, $188 ergonomic office chair, more ...