Purchased exclusively for measuring the car battery voltage.
Theoretically, while the engine is running, it should show a reading of ~13.5V, and while it is off ~12.5V.
It seems to work properly and is recommended for this purpose.
It is worth mentioning that the digital display is of unacceptable brightness. In sunlight, I was unable to read it.

So far, it charges two devices normally. However, it has a little issue with the application in the car's socket. It doesn't fit well

It works effectively for the quick charging of a device. The downside is that during the day the indicators are not visible at all and that it does not fit very well in the lighter socket.

Very good. It has the power it says. Very good application.

Nice that you can also see the battery level.

Excellent charger delivers 45 watts fast charging tested on Huawei P40 Lite and Redmi Note 10. Fits well in the car lighter. The measurement of the car battery is accurate. Measured with an external battery charger. I would like the numbers to be a little brighter. They are visible during the day but could be brighter.

Very good and it looks high quality, and mainly it has good contact with the car lighter (in the past, with other chargers they did not fit well and lost contact with the slightest movement).

I have had it for about a month. It works perfectly. The only problem is the cables, because whatever I have bought does not reach the Watts that this one provides, I have charged up to 18W. The screen is flashy and correct. Beautiful and functional gadget. It is worth every penny.

It does what it says... very good... and you can see at the same time the device's ampere while charging, while also being informed about the car battery voltage.

It does exactly what it promises. A very good accessory to know the battery status at a glance

Good product for as long as it lasted, namely 1 year and 1 month. Suddenly stopped charging and only shows the battery voltage. On the negative side, it does not support fast charging when charging in both ports simultaneously. Also, every time you plug something into the second port, the power cuts off from the first port for 1 second. Strange how such a high-quality product breaks in 1 year, while some Chinese ones I have since 2010 still work. The conclusions are up to you...

In order to achieve the 45Watt it claims, it needs to be connected to a 24Volt socket and not a 12Volt one. I haven't tested it on a 24Volt socket, but it is mentioned in the instructions inside the packaging.

It is fully worth its price, it attaches correctly to the lighter, you can see the voltage and comfortably charge 2 devices without fear. The only detail is that FastCharge only works if you have one device on top, but we can't have it all! If you have a mobile phone and want fast charging, just plug it in by itself.

The 3 days that it worked, it was perfect. I used it in my machine for 3 days and it was fine. When I put it in a car, it never worked and now it doesn't work in the machine either. I don't know if I got a defective one

I replaced the old one with this one for the voltmeter. It looks good and high-quality, and the voltmeter works fine, but it's only for nighttime... in daylight, you can't see anything because the lighting is very weak.

Very nice color that changes shades. Bright voltage indicator. The device recognizes how many volts are needed for maximum charging depending on the device. Charges very quickly. Worth it!