The PowerVault DSLR has a soft rubber coating for an expensive and luxurious feel and the 5V USB dummy battery has capacity of 8.4V. Double or triple the capacity of your camera battery depending on the battery you are currently using. We have integrated a push button capacity reader so you can always be sure you have the power you need on the go. Camera-specific dummy batteries are available for Sony, Canon and Nikon cameras. Simply open the battery latch, insert dummy battery, close the latch and you are all set. In addition, you can charge while you are using the PowerVault with an uninterrupted flow of power. Great for time lapse photography/video. 2-3-hour charge time.