While the ThinkPad T431s is an offshoot of the ThinkPad T431, and it has several similarities to the machine, the ThinkPad T431s may actually resemble a ThinkPad X 230 laptop. The designs of both systems are thin and light, and one thing to keep note is that the ThinkPad T431s does not come with an optical drive. This missing component may be a deal breaker for some.

To save weight and space, the T431s does not have Lenovo’s popular Ultrabay port, which comes with an optical drive that can be swapped out for a second battery or hard drive. In 2013 it makes little sense to have a built-in optical drive on a lightweight laptop, but users may miss the optional second battery, which added 3.5 hours to the T430s’s endurance in our tests. Unlike the T431s, which had a removable battery that lasted 5 hours and 9 minutes on our tests, the ThinkPad T431s comes with a built-in, 47-watt hour battery that Lenovo claims will last up to 9 hours.

Read More At: Lenovo Launches ThinkPad T431s, Lightest T Series Ever


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