I have been using the Kinect sensor of a lead-acid battery. Scary it first, but I have had no problems. The battery has reached voltages around 13v after charging. No issues with the Kinect. I believe the 12v is only used for it's motor. I want to push it higher. At times (while charger is connected the voltage reaches 13.6v. I still have not had the guts to try this, although my gut feeling is that it won't be an issue either.