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
Lenovo were driven by the popularity of Apple's iPhone and Lenovo's desire to increase its market share in mainland China. Lenovo passed Apple to become the No. 2 provider of smartphones to the Chinese market in 2012. However, due to there being about 100 smartphone brands sold in China, this second only equated to a 10.4% market share. In May 2012, Lenovo announced an investment of US$793 million in the construction of a mobile phone manufacturing and R&D facility in Wuhan, China. On January 27, 2011, Lenovo formed a joint venture to produce personal computers with Japanese electronics firm NEC. The