Review on 🔌 DROK 200102 DC-DC Buck Converter 3A Power Supply Module Step Down Regulator 12V/24V/36V to 5V Transformer USB+Micro USB MP3 MP4 Car Display GPS by Jeff Wells

This device is designed to power accessories without using the standard 12V power outlet. One of the best benefits of using this product is the ability to mount devices anywhere in the vehicle, although you may need an additional cable to power the 12V - and ground wire are about 6 cm long. With a 3A output, I have enough charge to simultaneously charge a small device via a standard USB socket, while a micro-USB port powers a Chromecast under my dash. Works great so far!