> The batteries may die, which means there must be a physical lock as well. Why not just have an A/C port somewhere so you can supply your own power if the bat

> The batteries may die, which means there must be a physical lock as well. Why not just have an A/C port somewhere so you can supply your own power if the battery dies? The worst a criminal could do at that point is try to crank a high amperage current through it and try to fry the computer, which would not unlock it.