The **Wii Console** uses **AC Power Only** (External Power Brick → DC In). **No batteries.**
The **Wii Remote (Wiimote)** uses **2 × AA Batteries** (Alkaline, NiMH Rechargeable, or Lithium).
Wii U GamePad: Built-in **Li-ion** (Non-user-replaceable easily). Charges via AC Adapter (WUP-011) or Cradle.