Anyone know where the memory battery is in this thing? I saw nothing resembling a battery, and even the components that i figured could be some sort of weird battery were labeled with C or R or D etc etc. (cap, resistor, diode) So it wasn't some odd thing like that. Took the front off, nothing there, took the board out, nothing under it. WTH is going on here?! How does it hold memory when unplugged?