Replace your Garmin StreetPilot c320 Battery or Keep an Extra Battery on hand as a backup. This is an Extended Capacity 2600 mAh, Lithium-Ion Battery that offers up even more up time than your original. Works in your StreetPilot c320 GPS. Simple, Easy and Inexpensive! You get a New Battery, FREE Tools (necessary for installation) , a helpful Installation Video, AND You also get a full ONE YEAR Money Back Guarantee exclusively when you purchase from NewPower99.Com! Please note that this product requires soldering in the installation process.