Pentax Optio S1 Battery and Charger with Car Plug and EU Adapter - Replacement for Pentax D-LI78 Digital Camera Batteries and Chargers (750mAh, 3.7V, Lithium-Ion) - Walmart.com
Amazon.com: Norifon D-LI68 USB Charger for Pentax Optio A36, Optio S10, Optio S12, Optio VS20, Q, Q10, Q7 Camera and More : Electronics
Amazon.com : Wasabi Power Battery (2-Pack) and Charger for Pentax D-LI68, D-LI122 and Pentax Q, Q7, Q10, Q-S1, Optio A36, Optio S10, Optio S12, Optio VS20 : Digital Camera Batteries : Electronics