This USB Multi-meter plugs directly into any USB socket or Micro-USB charger or cable. It displays on the screen the voltage, current and capacity. Acts as both a vol and amp meter. All three are shown at the same time so there is no need to switch between screens. It is powered when you plug it in so no batteries are needed. Backlit screen will let you see it in low light conditions. Will handle up to 3.5A which is more than enough to test any cell phone or tablet. The monitor is suitable for 0-2.5 Amps, and 3-20 Volts and has an accuracy better than 1%. It can also give you a rough estimate of the capacity of the device you are charging. Made by Muker. "Data Checking Mode" is entered by double clicking the button really fast. When in this mode the screen blinks and you can select the current data bank you are using by single clicking the button really fast. Each time you single click the button, it moves to the next data bank and then rotates back to the fist bank (bank 0) if you click it at the last bank (bank 9). You exit "Data Checking Mode" by double clicking the button really fast.
R**X
Great broken USB cable simulator A+ would sigh in disappointment again
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!
M**D
Handy little tool
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.
D**G
Works well !
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 !
J**R
Very small and neat device.
Clear and precise. Able to measure solar charger input and output.
T**O
Great device, cheaply made
Does what it describes, great tool for getting the best charge out of your devices.My model seems to have been a bit used though, the screen looks a bit scratched up on delivery.The screen is very cheap and can be easily scratched using your finger nail, but for what it is I am not too bothered. Does its job and that's it.
Trustpilot
1 month ago
2 weeks ago
