Weewooday 12v to 5v Dc Converter Buck Module USB Output Power Adapter Dc Car Power Converter Regulator(2 Pieces)

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.

I bought the 2 pack as I was skeptical about the quality/reliability with buck converters. I wired this in my pickup to provide a power source for USB-A and USB-C charge ports. Puts out 5.08V. I have not checked the amperage, however my iPhone 16 and iPad charge normally without issue. Unless I post an addition to this review, assume it’s still working without issue.

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.

Hardwired behind dash for dash cam12v vehicle2 wiresWorks just fine

pleased to find it worked as expected

Very low power. Not good for phone while using gps