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Replace your Garmin DriveAssist 50LMT Battery or Keep an Extra Battery on hand as a backup. This is an Extended Capacity 750 mAh, Lithium-Ion Battery that works in your Garmin DriveAssist 50LMT GPS. Simple, Easy and Inexpensive! You get a New Battery, Special Tools Necessary for Battery Installation, helpful Video Instructions, AND You also get a full ONE YEAR Money Back Guarantee exclusively when you purchase from us!