The CamRanger Wireless Transmitter Kit with Extra Battery for Select Canon and Nikon DSLRs from B&H bundles the Wireless Transmitter for image sharing and remote camera control with a spare or replacement rechargeable lithium-ion battery pack. The battery has an output of 3.7V and a capacity of 2000mAh, and can be charged in about 2 hours with the transmitter's USB cable.
The CamRanger Wireless Transmitter lets you wirelessly control select DSLR cameras from Canon and Nikon and view and share images via your mobile device. Remotely access advanced features, functions and settings, such as live view, intervalometer, HDR bracketing, photo capture, movie recording and more. The CamRanger creates an ad-hoc Wi-Fi network to which an iPad, iPhone or iPod can connect, and the free CamRanger iOS app enables camera control without a computer or existing Internet connection. The effective wireless range is 150'.