Replace your Magellan Maestro 5310 Battery or Keep an Extra Battery on hand as a backup. This is a High Capacity 1500 mAh, Lithium-Polymer Battery that offers even more up time than your original. Works in your Magellan Maestro 5310 GPS. Simple, Easy and Inexpensive! You get a New Battery, a Battery Installation Video, Tools for Battery Installation, AND You also get a full ONE YEAR Money Back Guarantee exclusively when you purchase from us.