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
Kastar Battery AC Charger for Pentax D-LI68 D-LI122 & Pentax Optio VS20 Q-S1 | eBay
UpStart Battery Pentax Optio VS20 Battery - Replacement for Pentax KLIC-7004 Digital Camera Battery (1100mAh, 3.7V, Lithium-Ion) - Walmart.com
Camera Battery for Pentax Optio S10, S12, VS20 / Pentax Q10, Q-S1, Q, Q7 - 650mAh, 3.6V, Li-ion | 500299931