More than 500,000 units are affected - they are powered by the now notorious lithium-ion 'Zippo' batteries made by Sony, which have a nasty habit of exploding into flames. Last week, a Lenovo-made laptop exploded in Los Angeles airport and this presumably grabbed the eye of the US Consumer Product Safety Commission, which is named in today's product recall. To our knowledge, the LAX Thinkpad was the first from Lenovo to go up in flames.