The Nikon EN-EL3e Rechargeable Lithium-Ion Battery from Lightbulb Rentals provides 7.4V, and can store 1410mAh of power - that translates into over 200 shots on a charge. The battery is compatible with Nikon D50, D70, D70s, D80, D90, D100, D200, D300, D300S, and D700 SLR Digital Cameras.
Quasar Battery Power Kit – Single Lamp, Single Battery$5/day
Anton/Bauer Elora 240 Gold Mount Battery (229Wh, 14.4V)$20/day
Anton/Bauer Digital G150 Gold Mount Battery (156Wh, 14.4V)$30/day
CORE CXAM-15 Gold Mount Battery Plate for SONY FX3 (w Slide Function/ 2 PTAP)$10/day
Battery: Canon BP-A30$20/day
Anton Bauer Gold Mount Plate$5/day
Canon BP-820/828 Battery$5/day
AA Rechargeable Battery$1/day