Description
OLED USB detector voltmeter ammeter power capacity tester meter voltage current mobile usb power charger 4 white font color
Plug it into any powered USB port and check that it is supplying the stated output voltage and current to keep all of your devices charging as efficiently as possible and that their batteries are still in good condition to avoid data loss.
The power analyser is also great for checking that USB wall chargers are working to their full potential too!
- Measures volts, Amps, time and capacity
- Convenient pocket sized unit
- Suitable for any USB socket
Product Features:
It adopts the OLED screen, it can clearly display all the data. And it display white color font,
It forbid for being used for inductive load, eg: the load with motor and fan. it can be used digital products, eg: mobile phone,power bank,USB flash drive etc..
- USB input,
- RTZ, Reset button , press it three seconds will Reset
- USB Out
- Voltage : 3.5V-9V ( 1% accuracy )
- Current:0-3 .3 A ( accuracy of 0.4% )
- Battery Capacity(0-99999mah)
- Working time (0-99Hour)
- Working time and Capacity have Memory function when device power off
- Display screen: 0.91” OLED screen
Detailed Review available at :Â http://goughlui.com/2016/08/20/review-teardown-keweisi-kws-v20-usb-tester/
bharat_kaushik –
Voltage, Amps, Active Load timer (with Memory), mAh (with Memory)… Love it…!
I absolutely love this…
Top row shows the voltage (volts – two decimal places) and the active time (timer runs only when a load drawing current from the output port).
The bottom row shows the current drawn (Amps – two decimal places), and total mAh.
The device remembers the total “Time” and “mAh” until the RESET button is pressed.
CHANDAN CHOUDHURY –
A very useful Gadget for any mobile user.
THIS GADGET IS AN ESSENTIAL GADGET FOR ALL MOBILE USERS; It gives useful data for a common man.
#. On connecting, it shows Voltage (Top Left) and acceptable accurate
#. Current (Botton, left) readings are correct.
#. Right top, charging timer is given with a reset button
#. Reset button is useful for Milli-Ampere charging Current (Right, bottom)
#. A very useful and working item
KRISHNA PRASAD M –
Product is quite good. Unfortunately, I have no other means to verify the readings whether it is correct or not and assume that it is correct. Otherwise, product is very good and works properly.
One cons that I face is because of the way the USB connector is placed. As it is fixed in the body itself, the display becomes unidirectional and in some connectors owing to the direction, it becomes difficult to read. Improving this would make the product very excellent one!
Dmp –
The product is high quality USB power monitor. I tired to measure the capacity of my new and old power bank, and this has consistently shown reliable readings.
the only complaint is that the reset button is very easy to press and can be inadvertently pressed while removing the device
anantrao –
Great for testing powerbank.
Works well and shows the current, voltage, capacity (mah), and time taken, great for testing powerbank capacity under practical conditions.
Srideep Prasad –
Useful.. Does it’s job
Does its job… The voltage and current readings seem accurate..Can sustain the higher voltages and currents of fast chargers..
Not too sure about the accuracy of the mAh readout though