Laptop computers are more fragile than Pocket Computers. Consider alternatives to Laptops in the field. Batteries only last several hours, and vehicle power is usually required. They are also more likely to be stolen. Batteries last longer than Laptop computers.
Color displays vary widely.
They can hold a day to a weeks data and maps. We recommend using a Flash card to backup your data. A rule of thumb is to backup your data whenever you have more data in the internal memory than you are willing to lose. We recommend backing up data from the computer to the Flash card at least twice a day. Pocket computers are more reliable because they have no hinges, no disk drive, and fewer internal electrical contacts.