Indipro B-Stock products may show various signs of use, such as dents or scratches that do not affect product function. All B-Stock items have been quality tested and comes with a 30 day limited warranty. Power your NP-FW50 devices by using this 2.1mm to Sony NP-FW50 Type Dummy Battery Cable. This 8″-long cable connects to an external power source with the 2.1mm barrel end, and the NP-FW50 dummy battery connects to your camera. Please note that this cable is not power regulated and will pass whatever voltage through it that you connect the cable to.