Amazon.com: Synergy Camera Batteries and Charger, Compatible with Pentax Optio E90 Camera, AA & AAA NiMH Battery Charger, Includes: 4-pk 2800mAh Rechargeable AA Ni-MH Batteries, Car & EU adapters : Electronics
Pentax Optio E90 10.1MP Compact Digital Camera - Black | eBay
Pentax Optio E90 Digital Camera with Deluxe Accessory Kit
Pentax announces Optio E90 budget camera: Digital Photography Review