Have power when you need it where you need it anytime with the thinkpad 90w ac adapter keep one in the office another at home and save your batteries for the road lenovo thinkpad 90w ac adaptor uk ibm thinkpad 90w ac adaptor uk same specifications as the standard 90w ac adapter that ships with thinkpad z series systems backed by a limited warranty from lenovo with renowned service and support available from ibm one year customer replaceable unit compatibility edge e545 edge e4