Since tablets, smartphones and portable ADS-B units are integral to our flying, USB charging devices have become necessary inflight accessories. You could carry along a portable USB power supply, but if you’re like us, you might forget to recharge it—if you can remember where you left it.
Both Guardian Avionics and True Blue Power (from Mid-Continent Instruments and Avionics) have the most complete line of panel-mounted USB power supplies engineered specifically for installation in aircraft.