Amazon.com : EN-EL11/D-Li78/DB-80/LI-60B/DB-L70 Replacement Lithium-Ion Battery (1000 mAh) for Pentax Camera : Digital Camera Batteries : Electronics
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