http://www.amazon.com/Digicom-DC-EPP3000-Xtreme-Power-Pack/dp/B00028VKRMJust like the old PP-99 Batteries. Not super capacity but great for little recorders (R09HR, iRiver, M10, etc.).
DigiCom DC-EPP3000 Xtreme Power Pack Li-ion External Battery Pack for Digital Cameras
•General Features:
•4-cell Lithium-ion rechargeable battery
•Supports 3-volt to 8.4-volt digital cameras
•Six (6) Power tips
•Two (2) Dummy battery inserts
•LED battery meter
•AC/DC operation
•10 times more shooting capacity
•Compact and light weight
•Plastic case with belt clip
•110/220-Volt
•AC power adapter can switch between 120V-60Hz to 230V-50Hz
•Supports Olympus, Nikon, Fuji, Minolta, Sony, Kodak, JVC, Sharp, Sanyo, Samsung, Casio and Cannon Digital cameras
•Voltage Switch:
•3.0V
•4.5V
•5.0V
•6.0V
•6.5V
•8.4V
•Power Specifications:
•5VDC --- 1000mAh