Replace your Magellan Maestro 4350 Battery or Keep an Extra Battery on hand as a backup. This is a High Capacity 1500 mAh, Lithium-Ion Battery that offers even more up time than your original. Works in your Magellan Maestro 4350 GPS. Simple, Easy and Inexpensive! You get a New Battery, a Helpful Installation Video, FREE Special Tools (necessary for installation), AND You also get a full ONE YEAR Money Back Guarantee exclusively when you purchase from us!