Even worse, the 'lock device' has a built-in battery that is replaceable. Your battery died while you are in that coffee shop? Well, you are just going to have

Even worse, the 'lock device' has a built-in battery that is replaceable. Your battery died while you are in that coffee shop? Well, you are just going to have to get a new battery somewhere so you can login to your computer. No, there is no usb port on this device so you couldn't just power it that way.