Amazon.com : Replacement for Pentax Optio W60 Battery and Charger - Compatible with Pentax D-LI78 Digital Camera Batteries and Chargers (750mAh 3.7V Lithium-Ion) : Electronics
Amazon.com: UltraPro D-LI78 High-Capacity Replacement Battery with Rapid Travel Charger for Pentax Optio M50 Optio M60 Optio V20 Bundle Includes: Camera Cleaning Kit, Camera Screen Protector, Mini Travel Tripod : Electronics