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10 of 10 people found the following review helpful
Does NOT work with Thinkpad PS with gray plug/yellow tip connector, does work with Lenovo black plug/yellow tip PS
on December 30, 2013
This is in fact male-to-male type connector (just as the pictures show). The rectangular connector fits X1 just fine, but the other side does not match my 90W Thinkpad PS that has a gray plug with yellow tip and a pin in the center (P/N 40Y7659).
It does match angled black plug with yellow tip on a PS for my non-thinkpad Lenovo laptop (it's smaller diameter than Thinkpad plug and does not have a pin in the center), so if you do have 90W version of that PS, it might work for you. Mine is 40W (ADP-40NH) and it is not able to charge X1 (charging icon is switching to non-charging about once every 2 seconds).