Cirrus SR20 Pilot Operating Handbook page 287

Cirrus Design
SR20
center console for use by the rear passengers. The ports comply with
USB Battery Charging 1.2 Compliance Plan, and are intended for
USB-compatible devices only. There is no data or audio access at the
ports. Amperage draw through the each USB charging port must not
exceed 2.1 amps. Power for the USB ports is supplied through the 5-
amp 12V DC OUTLET circuit breaker on the MAIN BUS 3.
P/N 21399-004 P/N 21399-004
Revision A1
Airplane and Systems Description
Section 7
7-103 7-103