OROROWomen's Heated Fleece Vest with Battery, Lightweight Heating Vest Fleece (Charger Not Included)

I am 5'2" and 140 pounds. Medium was very small. Large doesn’t seem much larger.Should I get an XL?

My vest is on and working, but the usb port is not working. Is there something else I need to do to turn the port on? I tried 2 different usb cords.

Where does the battery sit on the vest?

What size vest should I get if I am 5’ 3” and 140 pounds?