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Practical Meter

Practical Meter
Includes 3-in-1 Fast-Charge Cable

Have you ever experienced a time when you were charging your phone it just took forever!? Or maybe you've even had your phone die on the charger?  The Practical Meter is here to help you solve these problems by showing you in real time how fast your device is charging. Using the Practical Meter you can avoid common USB charging problems, and it's compatible with any USB device. 

MSRP $24.99

In Stock

Ships In 2-3 Days
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We have taken the guessing game out of off-grid solar charging! The Practical Meter's real-time power display lets you angle your solar panel toward the sun to charge your mobile devices at full speed!

See Example:


The Practical Meter has an intuitive dispaly that lets you know if you charging slow or fast.

The Practical Meter works with any usb cable port charge or device.

Different USB standards

The Practical Meter helps you distinguish if you are charging fast or slow on using the wall outlet, car charge, laptop, battery pack, or any other USB source.

USB stands for Universal Serial Bus, but nowadays USB is not so universal.  There are versions 1.0, 2.0, and 3.0 of USB, all of which have differing power requirements.  On top of this some manufactures add their own proprietary blend into the mix, making it so their devices work best only with their own brand of chargers.  Accidently using a bad combination of power sources and devices won't hurt your device, but can lead to charge times up to 4 times longer.


The choice of charging cable can have a huge effect on phone charging speeds.  With all the different USB standards that exist today it's easy to accidently use an out of date cable, resulting in longer charge times.  Some USB cables are dedicated for charging, and often times these charge only cables charge faster than sync/data cables.


The practical meter comes with three in one usb-micro, usb-mini, and dock connectors which are dedicated for charging only (no data).


Practical meter with Fast-Charge Cable usb power meter

Reviews practical meter review
The Practical Meter shows you the nerdy truth about which USB thing charges which USB thing faster.
-Kevin Purdy,
Gear Junkie practical meter review
Knowing how much ‘juice’ you’re getting while charging via solar power is a mystery... [The Practical Meter] lets you angle your solar panel in an optimal position toward the sun for the fastest charge.
-Stephen Regenold,


  • Can I still transfer data through the Practical Meter?

    Yes. The Practical Meter by itself allows the transfer of data between client and host.  This allows you to monitor charge rates while transferring music/photos on a phone, or see how much power a USB flash drive uses.

  • Does the Practical Meter work with Tablets?

    Yes.  The Practical Meter can measure up to 10 Watts (2 Amps) so you can see if your tablet is charging at full speed.

  • Will the Practical Meter work with my iPhone 5?

    Yes.  We do not currently sell and iPhone 5 cable, but the Practical Meter will work with the iPhone 5 or any other USB device.  Just use the cable that came with your device at the time of purchase.

  • Do the 3-in-1 cables transfer data?

    No these cables are optimized for charging only, so the data/sync functionality was necessarily removed.

  • How much power does it use?

    The Practical Meter only consumes a fraction of a watt, so it will not effect charging times on your phone. 

  • Can I charge multiple devices at a time with the 3-in-1 cables?

    Yes, if your USB power supply can supply enough power for all the device simultaneously.  You'll have to look at your device and supply power requirements, or use the Practical Meter to see if both devices are charging at full speed.


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