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 smartphones mobile phone division in 2008 to focus on its personal computer business and then paid $200 million to buy it back in November 2009. Lenovo re-acquired its mobile division to focus on mobile internet devices such as smartphones and tablet computers. On 29 January 2014, Google announced it would sell Motorola Mobility to Lenovo for US$2.91 billion in a cash-and-stock deal. When Google and Lenovo first announced the acquisition of Motorola, they said the purchase would be funded with $660 million in cash, $750 million in Lenovo stock, and a $1.5 billion promissory note due in three years. As of