Muker -KCX17 Universal USB Charger

I bought this small USB Amp meter in order to see why sometimes my phone would take longer to charge and to test each cable I had in house.It does exactly what it says on the tin, it provides you with Voltage, amper, and a rough MAH readin on an easy to read display.It also features 9 different slots, which makes testing different powerbanks/devices a breeze.It feature both USB and micro USB inputs.The MAH imput counter goes up to 19,999MAH reading, after which it will read FULL.I would highly recommend it to anybody who has multiple USB cables around the house, so you can see which ones are quality ones and which ones you should get rid off, and how CPU heat will affect your phone's charging performance (in my case I found out that if my Sony Z3 compact goes over 40 degrees, the powerdraw drops from 1,3-,1,4A to about 0,6-0,8A until it cools off.

This an excellent device. It feels well made, and the readout is clear. When I bought a similar (but not as good) item a couple of years ago, I had to get one from China through eBay, so it's good to be able to get this locally and quickly. I've used it to test a number of cables that I have for the amount of current they allow through. By using the different cables through the same charging plug, on the same device, then any difference in registered current must be due to the cable. I've been surprised (and a bit shocked) at how little current some of my cables allow through, whilst others which I didn't think would be much good, perform a lot better. If you want to charge devices quickly, then a good cable makes a difference, and this lets you find out which cables are good, and which are not.

Seems to be accurate and well made. Came with no instructions and has a button on it that seems to have no purpose... But looks nice and works fine.

Bought this to test some dubious usb chargers and a tangle of charging cables I have collected Ted over the year. I also bought a 1 and 2amp load device that can be switched between the two settings. The meter is easy to use with micro and full size usb input female sockets. The illuminated display shows the passing a,peerage and voltage across the device. It also has a memory for 10 readings accessed by means of a button switch. It also can show the amount of charging sent through it to say a power storage device.The result of my purchase was being able to condemn several charging cables (some nearly new) to the bin. This included some 2m flat cables that had very poor power transmission. I also three out a few old and new chargers that had unacceptable power outputs at what should have been 2 and 1 amps at 5 volts.A good buyOwer.

Functionality wise it's great, with a nice clearly readable screen. It reads out voltage, current and mAh consumed, with the latter seeming to have 10 nonvolatile memory positions with which to store totals.It also features a useful MicroUSB port allowing you to test voltage drops across cables instead of only at the source port like many USB meters (combined with a USB load tester for instance this is a great way to find feeble or bad USB cables that would cause phones to charge slowly).However... I'm less enthused about how mine came equipped with a dud cable itself!!! It sort of works but with lots of random voltage drops and at certain angles the power cuts out entirely. Needless to say that's useless on a device that's supposed to provide at least vaguely accurate power metering. The little flying USB lead is quite thin and feeble looking to begin with (bit odd considering it's meant to support 20V/3.5A) so I wasn't too surprised to find it was broken out of the box. The MicroUSB port works fine but as all cables drop voltage it not a suitable alternative for scenarios where you want to measure power at the host port.I live in the middle of nowhere and can't be bothered to haul myself to a neighbouring settlement to post this back. For the seven quid it cost (probably spend more than that in petrol!) I might as well peel it to bits and attach a cable of my own, or something. And then leave a grumpy review on Amazon.Harrumph!

And the option to use a Micro USB as input is excellent. Charged my fairly empty Anker with it, started at 2A, slowly dropped down to <0.5 A. Update rate about 2 samples / second. Would like filtered output but for this price, more than satisfied !

Not an all singing all dancing mighty Whurlitzer, but all the same very handy. Takes away the doubt over whether a device has finished charging and tells you what current it is drawing. Plus you get to find out which of your chargers is the main man. And at the price ... what's not to like.

Mine showed the voltage but wouldn't pass any current. Any device connected to it would not charge when using a power bank or USB charger. When connected to the PC USB port no device would be recognised. Tried a variety of devices and cables with the same result. Returning for a refund. No instructions were supplied.