Adapters that can be used with both DC and AC are pretty common as well. The reason why most of us buy laptops in the first place is because they are portable, it only makes sense to make sure that the laptop power supply universal we are using is adaptable to many of the different environments we may find ourselves in. When you consider the fact that you will most likely be replacing your laptop every 2 to 5 years, it makes complete sense that you should be purchasing a laptop power supply universal rather than the specific one that came with your laptop.
We have many laptop power supplies for brands such as Lenovo, Gateway, Acer, Sony and many more. If you can't find a specific model, we also have many universal Lapotp AC Adapters, with multiple tips for compatibility with several types of notebook PCs.