DC/DC 12V Step up to 13.8V Converter Boost Stabilizer | ICECO – ICECOFREEZER
Amazon.com: Hilitand DC Boost Converter Supply Module, Input Voltage 5V‑12V to 350V‑1200V Output Voltage DC to DC Power Module,Continuous Adjustable : ,DC-DC Converters | Advanced Energy,DC/DC 12V Step up to 13.8V Converter Boost Stabilizer | ICECO – ICECOFREEZER,40-2425 24V DC 13.8V DC DC to DC Converter Power Supply | eBay