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. 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. Compatibility Jupio PowerVault DSLR NP-FW50 - Sony E 28Wh Jupio PowerVault Features For your convenience the Power Vault has 1xUSB input, 1x USB output Compatible with DSLR cameras that use an NP-FW50 battery / Portable USB devices like smartphones, tablets etc. To check the remaining capacity, push button to show remaining capacity Double or triple the capacity of your cameras battery. Available for both pro cameras and entry-level/amateur cameras. Charge while being used.