Most recent upgrade (charging port type-c) on my T450 and x260 : r/thinkpad
User Guide
An Ultrabook that works with your projector: Lenovo T450s reviewed | Ars Technica
Lenovo ThinkPad T450s Review - Laptop Reviews by MobileTechReview
Amazon.com: Lenovo ThinkPad T450 14in HD Business Laptop Computer, Intel Dual-Core i5-5300U Up to 2.9GHz, 8GB RAM, 256GB SSD, HDMI, 802.11ac WiFi, Bluetooth, Windows 10 Professional (Renewed) : Electronics
Surprising behavior of Always On USB ports on a ThinkPad laptop - Super User