Replace your Garmin iQue M4 Battery or Keep an Extra Battery on hand as a backup. This is a Super High Capacity 1250 mAh, Lithium-Polymer Battery that offers even more up time than your original. Works in your Garmin iQue M4 unit. Simple, Easy and Inexpensive! You get a New Battery, a FREE Torx Tool (necessary for installation), AND You also get a full ONE YEAR Money Back Guarantee exclusively when you purchase from us. Video coming soon.