Lenovo Minidock [Series 3] available for a pittance. This is "Type 4337" and accepts 20 Volts @ 4.5 Amps for the computer on top of it.
It also has 6 USB, two outlets to video screen (VGA & digital), LAN, Microphone & audio sockets, and DC power input socket.
Part of my deceased brother's estate - and as neither myself - nor (especially) my brother have any use for it, I will offer it for a mere $50.
JUST make sure that YOUR Lenova CAN use this minidock - NO refunds!
Buyer collects from near HKU - and NO recriminations if it prove to be unusable, I can't test it out on any of our Laptops !
Leave a message here with your e'mail address and phone number, so I can send you a MAP.jpg to help guide you to my abode.