High Capacity 600 mAh Rechargeable Lithium Ion Battery - Guaranteed for One Full Year! Complete Battery Replacement Kit includes Video Instructions, Free Special Tools, Long-lasting Battery, and One Year Warranty Compatible with Your Garmin Edge 520 and Edge 520 Plus (Garmin 520 cycling GPS) Step by Step Video Instructions guide your through opening your Edge and successfully replacing of your Garmin Edge 520 GPS battery Kit Includes Everything You Need to Revive Your Garmin Edge 520 GPS Replace your Garmin Edge 520 Battery or Keep an Extra Battery on hand as a backup. This kit comes with a Rechargeable 600 mAh Lithium-Ion Battery that works in your Garmin Edge 520. You get a New Battery, Free Tools (necessary for installation), Video Instructions and You also get a full One Year Guarantee exclusively when you purchase our Garmin Edge 520 Battery Replacement Kit.