Overview

The Garmin 010-11666-00 is a 12 V in-vehicle charging clip for compatible Garmin GPS and sport watches, including the Approach S1. It plugs into a standard 12 V DC accessory socket and charges through a clip that holds the watch in the correct position for consistent contact.

On a boat, it’s a straightforward way to keep a watch topped up from the helm or cabin power outlet while you’re underway or tied up at the dock. Compatibility includes Approach S1 and select Forerunner models: 110, 210, 310XT, 405, 405CX, 410, and 910XT.

Key features

• 12 V DC plug for charging from a vehicle-style accessory socket commonly found at a helm, console, or cabin station
• Charging clip format that supports the watch during charging and helps maintain steady electrical contact
• Compatible with Garmin Approach S1 and Forerunner 110, 210, 310XT, 405, 405CX, 410, and 910XT
• No hardwiring required, making it easy to move between boats, vehicles, or a dock box
• Useful for topping off between legs, races, or travel days when a wall outlet is not convenient

Compatibility and fit

This charger is built around the charging interface used by the compatible watch families listed above. If your watch model is outside that group, the clip shape and contact layout may not match. If you use a case or cover on the watch, remove it before charging so the watch can fully seat in the clip.

Installation and setup

Plug the adapter into a 12 V accessory socket, then seat the watch into the charging clip until it sits flat and secure. On board, route the cable so it won’t snag on the wheel, throttles, or companionway traffic, and keep the clip away from direct spray or washdowns while charging.

Use on board

This charging clip is a good match for boaters who wear a compatible Garmin watch for timing, training, or activity tracking and want a simple way to recharge during transits. It also works well for keeping a spare watch powered up in a nav station or cockpit locker when you have a protected 12 V outlet available.

Maintenance and care

After saltwater exposure, wipe the clip and watch contact area with a lightly damp cloth and let everything dry before charging. Store the clip where the contacts won’t collect grit, and avoid leaving it plugged in where it can be soaked by rain or spray.