Overview

The Garmin 010-10723-17 is a plug-in high-speed multi-charger that adds two USB charging ports to a 12 V accessory outlet while keeping a pass-through socket available for another plug-in device. It accepts 10-30 V DC input (5.4 A max) and provides USB output at 4.75-5.25 V up to 2.1 A, making it a practical fit for both 12 V and 24 V onboard power systems.

On a boat, this style of charger is most useful at the helm, nav station, or inside the cabin where you already have a dash-style accessory socket and want to keep phones and tablets topped up without giving up the outlet for a handheld GPS, spotlight, or other accessory plug.

Key features

• Plugs into a standard 12 V accessory outlet to add two USB charging ports
• Pass-through power socket keeps the accessory outlet available for another compatible plug-in device
• Wide 10-30 V DC input range (5.4 A max) for use on 12 V and 24 V electrical systems
• USB output: 4.75-5.25 V up to 2.1 A
• Pass-through socket output: 10 V at 2.4 A max to 30 V at 0.8 A max

Compatibility and fit

This charger is meant for the common dash-style accessory socket found on many boats. Confirm your outlet is in good condition and holds plugs securely, since a loose fit can lead to intermittent charging in chop and vibration. Allow clearance around the outlet for the body of the charger and for USB cables to bend without being pinched by a dash door or panel.

Electrical and system integration

The unit is powered directly from the boat’s DC system through the accessory outlet, with an input range of 10-30 V DC. Before relying on it for multiple devices, check that the outlet circuit and wiring are suitable for the expected load, especially if the pass-through socket will be powering another accessory at the same time. The USB ports regulate to the listed 5 V range for typical USB-charged electronics, while the pass-through socket supports a range of 10-30 V with the stated current limits.

Use cases on board

This is a good match for boats that spend time underway with crew charging phones, tablets, action cameras, or portable speakers near the helm or inside the cabin. It also works well when you want to keep a plug-in accessory powered while still adding USB charging where you need it most.

Maintenance and care

Use it in a location that stays dry and is sheltered from spray, since accessory outlets and plug-in adapters are not intended for direct washdowns. Wipe the contacts and housing if they pick up salt film, and remove the charger when the outlet is not in use to reduce corrosion risk over time.

WARNING: This product is associated with a California Proposition 65 warning related to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.