(:Review:) KCX USB Power Meter/Multimeter w/mAh Capacity Reading ~Test & Monitor Chargers & Cables

Get This USB Power Meter on Amazon: http://www.amazon.com/dp/B015IN7L3M/?tag=miirii-20
Best When Used With a Constant Current Load Resistor Like This One: http://www.amazon.com/dp/B00X3HTHEM/?tag=miirii-20

A Good USB Power Monitor/Tester is a Great Thing to Have in Your Gadget Drawer, especially if you use a lot of aftermarket chargers.

There are a fair number of USB multi-meters on the the market, but I would definitely recommend getting one with mAh output capability. The cheaper ones like the DROK only show volts and amps and can’t tell you how much current you have used over time. With those cheaper ones you can’t test a battery bank to check and verify it’s capacity. That’s where this one comes in. It is one of the cheaper units that have mAh capability.

I have put it to the test along side my Amortek unit which I reviewed here: https://youtu.be/6Mc5SOMlDHw
This one is not quite as fancy as that one, but it costs $10 less. Once I figured out how to use it, I had no issues doing all the same tests I could do on the more expensive Amortek. So if you’re on a budget, buy this one and the SMAKN constant current load resistor (link above) for your testing. If you can afford the extra $10, go with the Amortek. This one still gets 4 out of 5 stars for being cheap and fully functional.

+ Displays Volts & Amps Accurately
+ Displays mAh to test battery banks for capacity and power used over time
+ Comes With USB Breakout Cable with Micro, Lightning, iPod Connector
+ Has Micro USB input for direct testing of Micro USB cables
+ Has 10 memory slots so you can store and come back for mAh data.

– Small Display
– Button Operation is a Little Tricky/Counter-intuitive

I will continue to use this meter in testing and have no trouble recommending it, just watch the video to learn how the memory function works.

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gorbulas says:

This one doesn’t have elapsed charge time

Samil Niftaliyev says:

Nice and clear explanation!

Thrushitha M says:

hi ,
I too bought USB tester, for testing current in USB cable ( one side of cable is camera and other end usb terminal) . And your explanation made it easier for understanding this USB tester. I have a problem. Power value keeps on increasing. When kept ideal and used on next day still power value is showing last reading. i mean it has not got reset even after one day of unusing it. How to reset this values on display ? Pressing that button only makes display to blink and memory increases.
Can u help me.
Thanks in advance.

olegtf says:

On calibrated passive resistor of 15 Ohms “tester” shows only 210 mA. Uncalibrated resistors of various values produced similar outlandish results. Conclusion – Current meter shows price of tea in China and can NOT be used as reliable source of information..

D S says:


@ 03:38 -> 04:00
You state that you have to multiply the measured mAh by 1,35 in order to get a very good approximation of the actual capacity of the inner power source.

– My question is, how did you come up to this number ? Maths, a provided formula if possible perhaps ?

– How “close” do you get to calculating the actual capacity of the inner power source ? 90 % ?

– Does this 1,35 factor depend on the type of inner power source which is used in the given powerbank (18650 or stacked LiPO 3,7 V batteries) or it an independent postulation ?

– Considering that the lowest scale of measuring is 3 V, would you still have to multiply the final mAh with 1,35, if you hooked up the USB power meter to, lets say, directly, to a series of parallel connected 18650 Li-ION cells ? You can fin these on eBay (18650 powerbank search keywords)
Because 3 V is usually the lowest safest voltage to which you can discharge any 18650 Li-ION battery. However there are exceptions – like the Samsung’s ICR18650 which, according to their data sheet, can be safely discharged to 2,75 V without any damage.

Much thanks 4 explanation. 😀

Best Regards,

Anthony Shepard says:

I have this unit but it’s under a different name. It’s exactly the same unit. Thank U for the information, it’s more in detail than other websites. lt’s a great little unit. By the way the unit that I have it’s called a Power Jive.

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