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  • PortaPow USB Power Monitor Version 2 (Multimeter / DC Ammeter for Solar Panels, Mains Chargers, etc)
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PortaPow USB Power Monitor Version 2 (Multimeter / DC Ammeter for Solar Panels, Mains Chargers, etc)


Price: $16.49
Sale: $13.99 & FREE Shipping on orders over $35. Details
You Save: $2.50 (15%)
In Stock.
Sold by PortaPow UK and Fulfilled by Amazon. Gift-wrap available.
Want it TODAY, Jan. 22? Order within and choose Same-Day Delivery at checkout. Details
Standard V2
  • Plugs into any USB socket, shows the Current, Voltage and Power going to the connected device.
  • Useful for testing the power/quality of mains chargers, usb cables, and solar panels.
  • 0-2.5A, 3-7V Range, Accurate to 0.01A, 0.01V. Uses <2mA (10mW) for the most accurate readout.
  • Backlit LCD (Not LED) screen so you can take readings in complete darkness or outdoors in sunlight.
  • Built in cable means you can turn the screen to face you, folds back into body for storage.
See more product details

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Frequently Bought Together

PortaPow USB Power Monitor Version 2 (Multimeter / DC Ammeter for Solar Panels, Mains Chargers, etc) + PortaPow Fast Charge Only USB Adapter for Apple iPhone, iPad, Blackberry, PS Vita, HTC One, Google Nexus, Other Fast Charging Devices
Price for both: $20.98

Buy the selected items together

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Product Information

Pattern Name: Standard V2
Technical Details
Part Number PortaPowStMonV2
Item Weight1.8 ounces
Product Dimensions3 x 2.4 x 0.9 inches
Item model numberPortaPowStMonV2
PatternStandard V2
Item Package Quantity1
  
Additional Information
ASINB00NTU18KY
Customer Reviews
4.3 out of 5 stars See all reviews
4.3 out of 5 stars
Best Sellers Rank
Shipping Weight2.9 ounces (View shipping rates and policies)
Date First AvailableSeptember 23, 2014
  
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Product Features

Pattern Name: Standard V2


Customer Questions & Answers

Customer Reviews

This allows for easy reading of its LCD display.
NLee the Engineer
Definitely good if you've ever wanted to know if another charger is just as fast as the OEM one supplied with a device.
Rob
GREAT for checking source voltage & charge amperage from any usb source.
Scott Gardner

Most Helpful Customer Reviews

Pattern Name: Standard Verified Purchase
Length: 4:38 Mins
This is a great product for those people that repair, build and work on computers. In addition it is great for trouble shooting or to just check out how well a USB port is working. You simply plug in this digital multimeter into the USB power source and then plug in your device to be charged into the other side of the multimeter. You can flip a switch and measure the current being drawn by your device from the source and you can also measure the voltage. There is no more guessing as you get accurate measurements with accuracies of plus or minus 1 percent for voltage and plus and minus 2 % for current.

The max current you can measure is 3 amps with a current range of 0 to 3 Amps. The voltage limits are 3 to 20 volts DC. The multimeter itself only consumes approximately 20 mW of power which is 4 milliamps at 5 volts DC.

I do a lot of reviews for battery packs, computers, computer power supplies, and USB hubs and I like to know the real data about how the products are really performing. This eliminates the guess work. I show in my video some of the results. The unit has a nice clear LCD display that is easy to read. It is not backlit so it draws as little power as possible to make a reading and display it. The unit makes 3 readings per second.

The unit will not only allow you to charge your device through it but it also passes through the data and allows you to sync your iPhone with iTunes for example. In my testing I tried this and it worked fine. This assumes that you are using a data cable. On an Android device it makes a difference if you have a charging only cable as the data pins are shorted to make the device charge faster at the AC charging rate. Your Android device senses that the cable is a charging only cable.
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71 of 81 people found the following review helpful By B. Deputy on August 14, 2013
Pattern Name: Standard Verified Purchase
I purchased this to feed my curiosity as to how much power my phone takes to recharge, and to monitor my USB solar panel.

I am very impressed by the accuracy of this monitor. It also has an extremely quick refresh rate (several times per second) so you can watch rapidly changing loads with precision.

However, I've discovered that it is adding additional resistance or some other alteration to the power or USB signal, which affects the charging rate of some devices. For example, my Galaxy Note II will only charge between 400-800mah with this device connected inline, from a 2A charge source (12000mah USB battery) using a power-only USB cable. If I plug it in directly, it charges between 1000-1500mah as expected.

I also have suspicion that it is somehow affecting the power charge rate when I transfer power from one of my 6000mah batteries to the other 12000mah one. The battery says it will accept up to 2A charge incoming, but the USB monitor only shows 1A. If I plug in directly, the battery power transfer is noticeably quicker, and the batteries warm up somewhat (as expected).

For additional reference (and observation), I have a 7-year old APC UPB-10 USB power source (2000mah, arguably the best USB battery ever made) which is totally unaffected by this monitor. It dumps 1.5A current in or out, regardless of conditions or the presence of the USB monitor.

To argue in this USB monitor's favor, the device does measure current and voltage correctly, and works as advertised. However, newer USB batteries which try to serve ALL smartphone manufacturers by attempting various "tricks" with the USB signal (short data pins, put resistor in data path, etc, etc.) are being blocked or modified by this USB monitor, hence my 3 star rating.
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17 of 19 people found the following review helpful By Scott Gardner on November 21, 2013
Pattern Name: Standard Verified Purchase
GREAT for checking source voltage & charge amperage from any usb source.
Verify that you're getting adequate voltage & amperage in real-time.

Under 5V at the source when charging? Your charger isn't "keeping up" with your device's charging capacity.

Getting adequate USB voltage (5.0-5.5V) at the charging source, but lower-than-expected amperage (while charging)?
It MAY be caused by your charging cable. At higher charge amperages, small-gauge cable used in many USB cables (especially cheaper aftermarket cables) causes significant voltage drop at the device. Lower voltage "starves" the device, and it may not charge at its maximum rated rate.
This is especially true of USB 3.0 devices, larger smartphones & tablets.

Even under "perfect" conditions, your device may not draw maximum rated current if its battery is near 100% capacity. To make sure your charging source & cable are up-to-task, check the amperage & voltage with the device at 50% battery capacity or lower.
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12 of 13 people found the following review helpful By J. Chambers HALL OF FAMETOP 10 REVIEWER on April 1, 2014
Pattern Name: Standard Verified Purchase
Length: 0:54 Mins
I sometimes need to test battery chargers for mobile devices like tablets and cellphones. Even without doing any quantitative measurements, it's apparent that some of them don't recharge as fast as others, even when they claim to have the same output voltage and amperage. And I've had a couple of cases where the problem was the USB charging cable, not the charger itself. I bought a USB power meter last year to check the output of chargers, and it's worked well, but lately, I've had reason to think that it was losing its accuracy, so I purchased the PortaPow USB Power Monitor, which I've been very pleased with. The power meter is very easy to use. There's only one switch, which is used to toggle between voltage and amperage.

One feature I really like about the PortaPow meter compared to the first USB meter I bought is the short cable between the USB plug and the meter itself. With this added flexibility, it's often much easier to read the meter's display.
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