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PortaPow Dual USB Power Monitor V3

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Product Description


This power monitor plugs directly into any USB socket and allows you to connect any USB cable into it for charging or data transfer. It displays on screen the voltage, current and the total amount of current which has been output. 

It is also allows you to compare the power of different USB sockets, see how much power each of your devices needs, and study the quirks of USB charging. This is especially useful for solar panels with USB outputs, since it will then allow you to position the panel to maximize the energy it outputs, see what factors affect the panel's performance, and also to see when the output is too low to be worth using the solar panel.

  • USB1: Incorporates SmartCharge adaptor as sold separately. This blocks data transfer allowing you to charge from any USB socket without risk of data hacking / viruses, and allows upto 4x faster charging than is normally possible from Computer / Car USB sockets.
  • USB2: A normal USB 2.0 socket, allows data transfer and charging.
  • 0-4000mA (4.0A), 3-20V Range, Accurate to 0.01A, 0.01V. Uses <13mA for an accurate readout. Fully compatible with Qualcomm Quick Charge 1.0, 2.0, and 3.0.
  • 9 different memory positions to store mAh values. 
  • Uses a backlit LCD display which can be seen either in complete darkness or bright sunny conditions.
  • Built in extension cable means you can turn the screen to face you.
  • 1 Year guarantee from PortaPow UK

 We also have a more advanced version, click here to view.


Product Reviews

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Showing reviews 1-10 of 29 | Next

  1. Accuracy is poor 2 Star Review

    Posted by on 6th Jun 2017

    I bench tested this power meter and the voltage accuracy is off by around 0.04-0.06. The current reading is off by a bit too.

    It also fails to register small loads around 25mA.

    This unit is nothing like the full sized Portapow power meter.

    Portapow says it cannot be calibrated. I was expecting this unit to be better than the cheapo ebay USB meters, at least those can be calibrated to a degree.

  2. v3 Works - but looks ugly 3 Star Review

    Posted by on 13th Nov 2016

    I got yesterday the USB Power Monitor V3 and tried on various devices. It works, as already described by others, quite acceptable. But the USB-Monitor looks completely different from the sales pictures. The display orientation is silver, high-gloss. The previous back print and additional information were printed in white on the left frontside. It seems ugly. Inferior looks and haptics. Realistically illustrated in the offer I would not ordered it here. A little bit esthetics must also radiate from a tool.

  3. good one 5 Star Review

    Posted by on 17th May 2016

    can recommend, helps me find best place for quick charging via solar panel, or testing all usb cables

  4. Nice to use! 5 Star Review

    Posted by on 30th Apr 2016

    I bought the PortaPow Power Monitor to let me see how best to orient my solar panel as it is charging various items whilst on expedition. It is functional, easy to read and I would recommend it to anyone that wants a quality means of measuring USB power.
    Geoff Murray


    Posted by on 25th Mar 2016

    I acquired it to use with my Powertraveller Powermonkey extreme's solar panel so that i can detect from which angle solar panel is passing max. power to the battery. Pretty useful little gadget. Does exactly as advertised. Am quite satisfied with it. Shipment is pretty fast also. Received it exactly on the 10th day here in Pakistan.

  6. CONTROL YOUR CHARGE 4 Star Review

    Posted by on 7th Mar 2016

    Provides information as voltage, amperage and wattage. Works as described! Use it together with my Powermonkey Extreme Solar Powered Charger and other rechargeable devises. Fast shippment!

  7. No turbo charger support? 2 Star Review

    Posted by on 7th Jan 2016

    It works fine until i try to plug it into my Nexus 6 stock turbo charger-- as soon as it's connected to motorola charger, the screen goes blank and cannot see anything.

    Other than that, works OK i guess!

  8. Useful tool works as advertised 5 Star Review

    Posted by on 2nd Dec 2015

    Monitors and provides voltage, amperage and wattage info of any female USB power source. Works well.
    Shipped overseas (South Africa) without problems in one month. VAT payable by recipient upon receipt of goods.

  9. Handy tool 5 Star Review

    Posted by on 25th Mar 2015

    Bought this to analyse various cables, chargers, and devices to see what was what. Have thrown out some underperforming cables as a result. Must have gadget.

  10. Must have tool for USB charging 5 Star Review

    Posted by on 18th Mar 2015

    I have a lot of USB powered gadgets, and using this tool saves me time chosing the best combination of charger/cable for each gadget.

    Simple to use and portable. I'd recommend it to all my friends, except they prefer to borrow mine. Bastards.

Showing reviews 1-10 of 29 | Next

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