Garmin has introduced new models of its GSB 15, a USB charger designed for a wide range of aircraft, now available with 27W USB Type-C charging ports.
While maintaining the same compact and lightweight design, the new GSB 15 models include two USB ports that support up to 27W of power output per port simultaneously, allowing pilots and passengers to charge most mobile devices while they are using them, according to company officials.
Other enhancements include new dimmable halo lighting around each port, new USB Power Delivery (PD) technology, and more.

The new models of the GSB 15 are offered with either dual USB Type-C ports or an option that includes a combination of USB Type-A and USB Type-C ports. Both new models include two 27W USB charging ports that can provide enough power to charge most later generation mobile devices during use in the cockpit and throughout the cabin.
The GSB 15 is available with a rear or side power input connector, allowing for installation in space-constrained areas such as near cabin sidewalls or armrests, according to company officials.
Another new feature is USB PD technology that enables the GSB 15 to provide optimized power output for a specific device, officials note.
In addition, new dimmable halo lighting located around the exterior of the USB ports allows pilots and passengers to connect to the GSB 15 easily during nighttime conditions and use the lighting bus to control brightness for optimal viewing. The GSB 15 also provides owners and operators with short circuit and over-temperature protection.
The new models of the GSB 15 continue to offer pilots the option to transfer databases to the GI 275 electronic flight instrument using a USB flash drive. In addition, owners and operators with a GI 275 and GSB 15 installation can record flight data, including Engine Indication System (EIS) data, and upload this information to a USB flash drive for an in-depth analysis, company officials said.

Installation is simplified as the GSB 15 can take the place of an existing aircraft instrument hole with an optional adapter plate, officials add.
Aircraft owners with an existing GSB 15 can upgrade to a new model GSB 15 by using the same connector and wiring.
The GSB 15 can be purchased through a Garmin Authorized Dealer with a list price of $399 for the dual USB Type-C variant, and a list price of $399 for the combination USB Type-C and USB Type-A variant (installation not included).
I can buy a 26 amp hour usb battery for $25, vs this module for $400.!
It must be the FAA certification that causes the development expense.
BTW, an automotive unit may not have the needed shielding to prevent noise in an aircraft VHF radio.
Total price = [automotive price] x 10 [conversion to aviation dollars] x 4 [Garmin tax]
How come every TSO’ed USB outlet on Aircraft Spruce costs ballpark the same then? Maybe there is no Garmin tax but it takes a little more to build a proper device compared to a China made plastic USB outlet?