Initial test with standard back plate, can use pressure pad or standard back plate. Battery is 18650 USB rechargeable battery (using in video) or can be replaced with 2 3V CR123A batteries. (I bought other flashlights and lamps that take the same USB battery so I will have a total of 5 batteries & always running the mount 
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Did yours come with a charger? Mine just came with the rechargeable battery and usb cord.