ThinkPad T series T420s, and the T520, have been lauded for their battery life – up to 30 hours with a 9-cell battery slice. ThinkPad T series The ThinkPad T series is a line of laptop computers introduced by IBM in 2000. After the transfer of the consumer computer division in 2005, they were developed and marketed by Chinese technology company Lenovo. IBM introduced the T series as part of their ThinkPad brand in 2000. The laptop was meant to cater to users working with multiple networks and in different environments. This resulted in the development of the IBM Embedded Security Subsystem. From
ThinkPad Tablet take advantage of the Tablet's touch capabilities. This feature could be used to transfer data between USB devices, internal storage, or an SD card. Slashgear summarized the ThinkPad Tablet by saying, "The stylus and the styling add up to a distinctive slate that doesn’t merely attempt to ape Apple’s iPad." The ThinkPad Tablet was discontinued upon the launch of the Windows 8-based ThinkPad Tablet 2 in October 2012. At the same time, Lenovo discontinued the use of Android on its ThinkPad-branded tablets; subsequent models, beginning with the Tablet 2, have exclusively used Windows as their operating system. David Hill of