Replace your Garmin Nuvi 2757 Battery or Keep an Extra Battery on hand as a backup. This is a 1500 mAh, Lithium Ion Battery that provides equal or better performance than your original battery. Simple and Inexpensive! You get a New Battery, FREE Special Tools (necessary for installation), Video Instructions that show exactly how to replace your battery, AND You also get a full ONE YEAR Money Back Guarantee exclusively when you purchase from us!