[quote= www.theregister.co.uk/2014/03/27/lenovouch_thinkpad_batteries_recalled_over_overheating_risk/]"On March 27, 2014, Lenovo voluntarily recalled certain lithium-ion batteries. These batteries were manufactured for use with ThinkPad notebook computers that shipped worldwide between October 2010 and April 2011," the company said. "Lenovo is offering replacement batteries free of charge regardless of warranty status."
The battery problems affect the Edge 11, 13 and 14 series, the T410, T420, T510 and W510 series, and the X100e, X120e, X200, X201 and X201s lines. Batteries that came with the laptops, and those bought as spares, have been recalled, and the problems affect 3-cell, 4-cell, 6-cell or 9-cell parts.