20V AC Charger Power Supply Adapter Converter Cable Cord for Lenovo ThinkPad T440 T440p T440s T540p, X1 Carbon, X140e, X240 Yellow Square Plug with Pin to 7.9*5.5mm Round Tip DC Jack -
Genuine Lenovo AC Adapter 135W for Thinkpad Laptop T440 T450 T530 T540 w/PC OEM | eBay
Amazon.com: 65W 45W 20V UL Listed Charger Square Tip for Lenovo ThinkPad T/X/E/L/B/Z ThinkPad T450s T470 T460 G50 T440 T450 Yoga IdeaPad Supply Cord (NOT USB-C) by Uflatek : Everything Else
AOKID 2Pcs AC Charger Adapter Cable for IBM Lenovo ThinkPad T440 X240 X1 Power Supply - Walmart.com