This Switronix PowerBase-70 Kit
bundles the PB70-24 PowerBase-70 Lithium-ion Battery Pack for Canon 5D Mark II and 7D DSLR cameras with its 90-240VAC PB70C PowerBase Charger. The battery features 14.8V of output power and 4.8Ah of capacity, and is rated at 70Wh. It's designed to extend HD movie recording time, offering six times the power of the camera's standard internal battery.
The PowerBase-70 mounts under the camera and doubles as a grip. Alternatively, it can be attached to a camera support via its 1/4"-20 release plate or V-mount. The supplied DV-CH24 Interchangeable Regulator Block has a 24" cable for even more mounting flexibility. The PowerBase-70 is also capable of providing extended power to up to 2 additional 12VDC devices, such as lights, monitors or HD converters. The battery can be fully charged in 4-5 hr via the included charger with P-tap connector. The charger runs on 90-240VAC power, enabling this kit to be used all over the world.