Robocraze USB Voltage Current Meter Charger Doctor Mobile Detector Battery Tester

The media could not be loaded.  Well the device monitor is pretty much accurate for all devices I have tested. It's only used for testing propose, not for long run charging along with the charging device as this mini monitor get heated up if current is1A or above 1A. (Heating for long time will definitely reduce its life or melt down it's solder as there are no heat sinks for long run propose). For this price this is the ultimate testing mini monitor.Hope sooner we will find industrialists manufacturing for India manufacturing these types of devices.

This is very handy way of finding out how much safe the charger voltage is and how much current the phone or tablet is drawing from the charger. First 2 units were OK. In next 2 units, the connection was a bit of challenge. If I insert the USB charger cable's A type connector in this module then it would go fully well inside but the current drawn was zero. If I pull it out a little bit then it would start drawing current.You can see how the charging current reduces with time as the battery gets charged and that gives you some indication that battery is in good health.I use it for testing or measuring current drawn by Arduino & other micro controller boards, under different operating conditions.

Doesn't work as expected for me as its voltage capability for Qualcomm Quick/Fast Chargers is capped at 7.5V. As a result my 9V/2A output is reading as 7.5V/2A even though fast charge is working. You need to throw a wild guess when you see 7.5V that device is working.Apart from that 5V output is reading okay.

very cool, fun and useful gadget. i use it to check the power output of my mobile charging adapters, in current time where there is huge surge for fast charging capability mobile adapters, this device right here helps to measure it's true potential. it is very useful for engineering students as well, specially for those who are in Electronics & communications department, it can be used to check the output capacity of an USB source.

So let's start with pros and cons stuff:Pros:-AccurateSmallSturdyCons:-There is no physical button to switch between voltage and ampere.There is no way to save your data.So in conclusion this is a entry level product. So, best buy in 200 bucks!!And also I got to know the defect of my fast charger!

Go for it.

Works fine. Seems accurate.Only con is the voltage range is upto 7v only and ampere range is upto 3A which means it won't support quick charge 2.0 9v, 12v configurations and any later quick charge versions.Still I find this product very useful, It helps me detect charging issues.(Photo included shows phone charging at 1A, reading fluctuates from 0.92A to 1.01A)

Works fine. Seems accurate. Useful for testing or measuring current drawn by Arduino & other similar micro controllers .I recommended for buying