Wii U Has A Mystery Port/Slot?

[Soundwave]

thekitchensink said:

Soundwave said:

ghost_of_fazz said:
Hah, nope.

There goes the battery for keeping the date and hour. Just like in the Wii.

The Wii has a battery slot?

Anything with a built-in clock has a battery for it.  Otherwise it wouldn't be able to keep track of the time while the system was turned off.

Gotcha. Neat. Do the 360 and PS3 have this too?