Review on 🔌 YONHAN Quick Charge 3.0 Dual USB Charger Socket with Waterproof Power Outlet, Fast Charge, LED Voltmeter, Wire Fuse DIY Kit for 12V/24V Car Boat Marine ATV Bus Truck and more - Red by Justin Jeppi

Bought this for example for portable and fast cell phone charging in an emergency and works great on my Samsung Galaxy S8 as well as any other USB powered device. The USB device is designed for use with batteries and other 12V to 24V DC power supplies. I have replaced the ring terminals with Johnson Power Pole 30A connectors for connection to ham radio power supplies in both fixed and portable to facilitate applications. The device has an LED display of the input voltage from the power supply. This gives good information on how your power supply handles the charging load. I'm noticing voltage fluctuations, probably in response to fast charge mode. So the charge voltage gives you an idea of the state of charge if you know what to look for in your gear. Most basic power supplies don't have built-in voltmeters, so this one adds a feature. The design is practical and durable, and although I bought it for portable and emergency use, it could find use in everyday workplace use.