Replace your Magellan Roadmate RV 9490 Battery or Keep an Extra Battery on hand as a backup. This is a High Capacity 1100 mAh, Rechargeable Lithium-Ion Battery that works in your Magellan Roadmate RV 9490 GPS. Simple, Easy and Inexpensive! You get a New Battery, FREE Special Tools (necessary for installation), AND You also get a full ONE YEAR Money Back Guarantee exclusively when you purchase from us!