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 Lenovo said he believed the ThinkPad Tablet to be "the weapon of choice for business success". In his article on the development of the Tablet, he indicated that every design detail was subjected to multiple design reviews, including basic elements such as the placement of the logo. A challenge was indicated to be designing and integrating a digitizer pen into the Tablet, which already had a "crowded interior". This required a study of pen barrel diameter and the balancing of batteries, digitizer technology components, ergonomics, and storage space constraints for the pen itself. Additionally, dowel rods were used for diameter