We’ve always been impressed with the quality and features built into Audio Authority’s White Lightning line of portable ground power units, and the latest SmartGPU is the most impressive yet. Aside from intelligent circuitry that offers failsafe and precise external DC power input, it works with a useful smartphone app that makes it easy to control the power from inside the cockpit. Aviation Consumer Editor in Chief Larry Anglisano spent some time getting a demo with Audio Authority’s Jon Sisk at the Piper Aircraft exhibit at AirVenture 2024 where the latest SmartGPU was powering Piper’s M700 Fury turboprop single.