Q. Should I use 48V phantom power or a battery for my DI box?
Amazon.com: Radial J48 MK2 48V Phantom Power Active Direct Box : Musical Instruments
Amazon.com: Klark Teknik PRO DI ACTIVE DI 10A Active DI Box with Midas Transformer, Extended Dynamic Range and Phantom/Battery Operation : Musical Instruments
Phantom (unmanned aerial vehicle series) - Wikipedia
The Consumer Electronics Hall of Fame: DJI Phantom Drone - IEEE Spectrum