Okay, I JUST got a wii, so don't blame me for being dumb.
Neither of my two wiimotes are working, I know the reason, because the battery level is low. Does it mean I change the batteries? Or does it recharge over time?
Yes, when you're batteries are getting low on your Wii Remote, change them. Rechargeable batteries are not mandatory, only if you don't want to switch batteries every week or so. You'd also need to buy a recharging dock [mentioned above] to put the Wii Remotes on