Replace your Garmin Edge 810 Battery or Keep an Extra Battery on hand as a backup. This is an Extended Capacity 1000 mAh, Lithium Ion Battery that offers up even more up time than your original. Works in your Garmin Edge 810 GPS. Simple, Easy and Inexpensive! You get a New Battery, FREE Special Tools (necessary for battery installation), a helpful Installation Video, AND You also get a full ONE YEAR Money Back Guarantee exclusively when you purchase from us!