This is a review of MPow 4.2A dual usb port car charger. Amazon.com: Mpow® 4.2Amps 20W Dual USB Port Car Charger for Apple and Android Devices - Black: Cell Phones & Accessories
Car charger is probably one of the most common smartphone accessories. We all like to take trips, stream our favorite music stations, keep our eyes on the traffic with Google maps, make some phone calls, and maybe even have wifi hotspot running for other passengers in the car. All this is going to drain your phone battery in no time. That's why we need to keep our phone on a charger while driving. And not just any charger, we need something that's going to source enough current to charge your phone at max speed. Let's take a closer look at what I found.
Both of the MPow car changer units, black and white, arrived in a nicely packaged box with a front display showing the actual charger. Taking it out of the box revealed a very compact dual car charger, about 3.5" in length and almost 1" across usb port side. When I say compact, I mean it was a size of a regular single port charger, while they were actually able to squeeze two in there. Another good point about compact size is that it won't take too much room in cigarette outlet and won't interfere with anything next to it. Once plugged into the outlet, it has a nice soft blue light to indicate the power is on and also to guide the connection in the dark. I do have to note that usb connection itself is a bit on a tight side which is actually good to hold the cable without falling out. But at the same time pulling on the cable will actually remove the charger itself unless you hold it down with your hand.
The most important test is if it can actually deliver 2 amps per port. A lot of the chargers claim they do, but it only works when one port is plugged in. In this case, I was able to confirm charging my Note 2 at max speed (the same reading I get from my original 2A Samsung wall charger), and I was able to do that while also charging Nexus 7 (HD, 2013 edition) which charges at 1.5A. Although I don't have two Note 2 to verify full 4.2A dual charging capacity, I have a feeling that won't be a problem.
Overall, I found this dual usb car charger to have great performance, solid build, and delivering it's advertised charging capacity without a problem. Covered by 18-months warranty and currently on Amazon for $6.99 (down from original $9.99, need to use code MPOW01CA at checkout) - this is one fantastic value!
Here are the pictures.