Weewooday 12v to 5v Dc Converter Buck Module USB Output Power Adapter Dc Car Power Converter Regulator(1 Piece)

Easy hook up and works well simple and clean .

Works quite well. Tested at 12.3 volts input , it will actually deliver 3.0 amps at 4.93 volts which is better than I expected. (NOTE: One of my USB power meters turns out to not have a good connector, making my initial impression much worse.) I enclose some measured voltages with an adjustable USB load, from no load up to I=3.0 amps. It does not get very warm. Peak efficiency is 0.89 at 1 A, and it is still 0.82 at 3 A output. Quiescent draw (no output load) is 6 mA at 12.3 V input. I wish the MFR would publish this kind of data but I guess they figure no one cares.

I've purchased several of these for outdoor use. I had some cameras that were approved outdoor use, but their power supplies were not. I was able to find outdoor garden light power supplies that had a voltage that was a little too high. But those voltages were within the range for this product, making them a perfect solution!The electronics for this device are sealed in what I think to be epoxy. There's is no way that I can find for water to leak in. I connected these to the garden light kit, and to my camera and it worked like a charm. Afterwards, I got several more of these and they've been working reliably ever since then.

We use it to keep an ipad charged and the hardwire to 12v makes for a cleaner installation instead of a cigarette lighter plug. If the ipad is used all day, the charge won't stay at 100% but it's possibly (probably) because the battery is getting old and not the adapters fault.

Using this in my car, which is not garage kept, for a VIOFO dashcam. Worked well for 2 years. The heat and vibration finally got to it, now it draws 0A and outputs nothing. Wish there was an automotive rated one on Amazon for a few dollars more... This one is still excellent for the price.

Good quality

Great if you need to have a hidden USB Port

Its spec says it can output 5V/3A. When no load is connected, the output voltage is 5.11V. But once it is connected a cellphone charger which requires 5V/2A to charge, this unit's output drops to 3.88V, which is useless for my application.