9V/12V/24V to 5V USB Step Down Power Module DC-DC 7.5V-28V to 5V 3A Precise Vehicle Charger Buck Voltage Converter Module 4Pcs

This is a wonderful little circuit, It’s only about .75”x.75” and if you connect it to DC power source of 7.5 volts or more you’ll have an instant USB charger. Using a couple surplus connectors, scrap wire and pieces of PVC pipe I made a dual outlet USB charger, powered by a Lithium battery from a cordless drill. It took about an hour, not counting waiting for the paint to dry.When used for their designed purpose these things are great. A previous reviewer tried using them “off label” and unfairly rated them poorly.

Robust little board that steps down 12v to 5v so I can reuse some old alarm wiring in the walls to put cell chargers for repurposed tablets. I purchased to many because I didn't see that multiple came in an order... So now I am dreaming of more things to do with the extras.

First time I got this product, I was able to remove the USB plug and use out+ and out-. Recent order, it has changed completely and now I can't remove the USB plug.