If i disconnect both micro USB cables and have no input voltage but have a fully charged 3.7v battery connected correctly with the green light on and all four LEDs illuminated, the UPS Hat does not power on the Rasp Pi. It also doesn't appear to provide any power over the GPIO ports as well. What am i doing wrong here? Battery is fully charged and wired correctly, The Hat is installed correctly and the raspberry pi 3 B is in working order.