DC 24V to DC 12V 1A 1.5A 18W Step Down Converter 24 Volt to 12 Volt 1500mA CCTV Camera Buck Voltage Power Supply Module US $2.49-$2.99
On-board DC-DC Power Electronics To Convert Lithium Ion Battery Output Of 200-750VDC To 12 Or 24VDC Output US $460.00-$920.00