absolutely love this heated vest. i work in a garage that often has the bay doors open and never quite allows the garage to fully heat up so often it will be 40-50 degrees. this vest allows me to wear short sleeve shirts with just the vest over the top of it and keeps me warm. the first day i really put the battery to the test and i was able to run one heating element for at least 6hrs. charging the battery overnight was as slow go the first night because i used a regular usb-c and block. the pr...