Review on Belker Universal 65w 45w Laptop Charger: Compatible with Dell, HP, Asus, Lenovo, Acer, Toshiba, Samsung, Sony, Compaq, Fujitsu, LG, JBL, Gateway Notebooks, Chromebooks, Ultrabooks - AC Adapter Power Supply Cord by William Sanchez

Although not officially supported, I was able to use a 6.5mm/4.4mm (w-pin) adapter to power my Samsung U28H750 4K monitor. Monitor power specifications: 19 V DC, 1.5 A and 59 W peak power. This power supply connector is rated for 19.5V, but the monitor worked fine. Huge savings on an unexpected trip. In my rush to pack for my job change, I forgot to pack the original power cord for the monitor. Hope this helps someone in the future.