Replace your Garmin Nuvi 660 Battery or Keep an Extra Battery on hand as a backup. NewPower99 Battery Replacement Kit comes with a High Capacity, High Quality 1150 mAh, Lithium-Polymer Battery that offers up even more up time than your original. Works in your Garmin Nuvi 660 GPS. Simple, Easy and Inexpensive! You get a New Rechargeable Long Lasting Battery, FREE Tools (necessary for installation), Video Instructions to guide you through opening your Garmin and replacing your Battery, AND You also get a full ONE YEAR Money Back Guarantee exclusively when you purchase our Garmin Nuvi 660 Battery Replacement Kit. Please check your order before you place it. This Battery Replacement Kit is for the Garmin Nuvi 660 GPS. It is not compatible with the Garmin RV 660 GPS. The ASIN to order if you have a Garmin RV 660 GPS for your Recreational Vehicle is B07G4N7BHP