When you decide to buy a notebook, there are some important things you need to consider.
First, you have a different set of security issues with a notebook. Your firewall becomes more important, as you will be connecting to "foreign networks" — networks other than yours! You want to make sure that your notebook does not trust the computers on the other network.
Whether you’re connecting wirelessly at the coffee shop or via an Ethernet cable in the hotel, you’ll be exposed to other computers.
Unless you’re careful and unless your firewall is very good, you may end up trusting those other computers on that network — allowing them to initiate communications with your computer and allowing them access to any files you are sharing.
Second, you have a battery and a power brick. Unless you really want to minimize your battery life (got that?), take your power brick along and use it when its convenient.
Today’s notebooks use Lithium Ion batteries. Unlike the nickel-cadmium (NiCad) batteries of the past, lithium ion batteries do not have a damaging "memory effect" if they get recharged before they are fully discharged.
The older NiCad batteries would lose capacity — they’d begin to think that the minor battery usage was actually the entire capacity of the battery. So, the NiCad batteries needed to be run down to the maximum possible before being recharged, or they’d lose capacity.
The lithium ion batteries actually have a different problem. They like to be recharged. They like to be recharged often. And, they like to be recharged before they’re exhausted. You can actually shorten your lithium ion batteries by running them all the way down.