Garmin Charge Power Pack

This external battery pack plugs directly in to the compatible Edge® cycling computer, giving you up to 24 hours of additional battery life. It even fits into the new flush out-front bike mount.
You can charge on the go by connecting the Garmin Charge power pack to any compatible fitness device with an additional cable — including wearables and other cycling computers. Just connect the power pack with a USB charging cable so you can stay in the action and get the most out of your activities. Weight: 132 g.