FYI, Lenovo is recalling Sony batteries of these models: ThinkPad R Series (R51e, R52, R60, R60e) ThinkPad T Series (T43, T43p, T60s) ThinkPad X Series (X60, X60s) You can check here to see if your particular computer is affected: http://www-307.ibm.com/pc/support/site.wss/document.do?sitestyle=lenovo&lndocid=BATT-LENOVO Cheers, Carlos