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Maplin USB Power Meter

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Quoting product code: N55CE


About this product


  • Displays Current and Voltage from any USB device or charger
  • 4 modes of measurement
  • Real time Current, Voltage, maximum Current and minimum Voltage

Product overview

• Displays Current and Voltage from any USB device or charger
• 4 modes of measurement
• Real time Current, Voltage, maximum Current and minimum Voltage
• Easily identify problems with current or voltage from USB devices and chargers

The Maplin USB Power Meter is a must have product for testing USB devices and chargers. It's small LCD display shows current and voltage values whilst plugged into any USB socket. (mains USB power supply or laptop / computer USB socket) Simply plug your USB device inline to easily test and identify problems.

Rated 4 out of 5 by from Fit for the job, with small reservations I chose this product over a thousand other, cheaper alternatives available from certain unnamed online market places for two reasons: 1) It works with USB 3 2) It has the maximum current feature I must say, the first impressions are good. It looks very nice in its clear, transparent case. It worked right away and performed all the functions correctly. There are two things to keep in mind: 1) The measurements are updated about once per second. If you are looking for short current spikes, you may miss some. 2) To measure the maximum current, it needs to be switched to the maximum current mode. Do not expect to monitor the real-time current and rely on the device to keep track of the maximum current, it won't. It can do one or the other. Do I regret buying it? Absolutely not! Would I still choose it over a cheaper alternative if I knew the above beforehand? Definitely! Am I happy with the purchase? You bet! ;)
Date published: 2015-05-07
Rated 5 out of 5 by from Works perfectly Bought this a while ago as the one we had wasn’t the best quality. So very pleased with this USB Power Meter, works perfectly every time. Totally recommended.
Date published: 2017-10-03
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Min Voltage Range: 0.05V
Max Voltage Range: 5V
Min Current Range: 0.02A
Max Current Range: 2.0A
Colour: Translucent
Product Width: 22mm
Product Depth: 10mm
Product Height: 65.8mm
Product Weight: 13g

Other products similar to this that I have found get very hot quite quickly, does this keep relatively cool?

Asked by: Callum
Unfortunately we are unable to guarantee full compatibility for this item in your intended application, I am sorry for any inconvenience this may cause you.
Answered by: darren cordon
Date published: 2017-07-24

Is there a mac/pc/linux driver or utility that allows me to monitor the current voltage from a laptop that is charging my phone.

Asked by: ferg22
I am sorry but the item in question does not support use in your intended application.
Answered by: Les
Date published: 2016-08-02

What does a lower case h in the display mean? eg 68'h in Current A mode

Asked by: Bounce 57
This service is for frequently asked questions and does not allow two way communication, In order for us to best assist you with your technical issue please contact us on the details below: 0333 400 9757 or email
Answered by: Dominic
Date published: 2016-06-30

Does it support USB 3?

Asked by: pichlo
Yes this item shouldn't have any issues with usb 3 compatibility.
Answered by: Billy
Date published: 2016-08-19
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