Pentax D-LI8, D-LI85, D-LI95 Battery (2-Pack) and Charger by Wasabi Po – Wasabi Power
Amazon.com : Replacement for Pentax Optio S5i Battery and Charger - Compatible with Pentax D-LI8 Digital Camera Batteries and Chargers (750mAh 3.7V Lithium-Ion) : Electronics