Being someone who is constantly using different gadgets USB ports are very important to me. They are what charge most of my gadgets and of course I use them for USB flash drives and hard drives too. One thing that always annoys me about changing devices is that some USB ports will charge devices faster than others. What if you could tell which USB port was providing the most power? That way you could plug in your critical devices like your smartphone into this port and other non-important devices into the low power ports. Well that is where the Practical Meter comes it. It works as a pass-through that you plug into your USB port and it will tell you how much power it is delivering. The device also ships with a nifty fast charging cable. Read on as we check it out.