Here are some features that have to see before you buy Portable
Processor and memory
The central processing unit (CPU) or processor is the brains of the notebook. More processor, the better the laptop will run. The processor speed is measured in gigahertz (GHz), which indicates the speed of the laptop. A laptop with 2 GHz processor speed is considered good. Another important element of your laptop is RAM (Random Access Memory), which provides temporary storage for laptops. The 512 megabytes (MB) of RAM should suffice your needs, whether you are looking to buy a laptop for simple applications, web browsing and listening and viewing audio and video.
Screen Size
The screen size can be a compromise between the portability of the laptop yet. It is measured diagonally on laptops. In general, the screen size varies between 11 to 17 inches. The bigger the screen is the heaviest of your laptop will be. If you need more visibility for your laptop, you can choose a larger screen, or if you want portability, you can carry a laptop with a smaller screen.
Drives
The hard disk size depends on storage requirements you have. In case of large projects files, store video and audio, you may need larger hard drives, while if you have simpler requirements for storage, up to 40GB can be sufficient for your needs. External hard drives and CD / DVDs is optional and depends on the needs of the individual.