DC-DC Buck Converter 2-Port USB with QC3.0 from ICStation
Sponsored by JLCPCB ($2 for 10 Boards): https://jlcpcb.com
Looking at a DC-DC Buck Converter Voltage Regulator DC 9V/12V/24V to DC 5V Car Step Down Power Supply Transformer Adapter Module 2 USB Port Fast Charging Board with Acrylic Shell
http://www.icstation.com/buck-converter-voltage-regulator-9v12v24v-step-down-power-supply-transformer-adapter-module-port-fast-charging-board-with-acrylic-shell-p-13287.html