The remotes aren't chargeable (well, ours aren't) unless you put rechargeable batteries in them. I highly recommend hi-tech rechargeable batteries though (get 2 complete sets so there's one set in and one set charged)
wiifit is great. love mine. get another remote at the least. nunchuck if you can. i bought wii points cards as well so i have got all the classic mario games etc downloaded onto my wii now at hardly any cost (2000 points cost me £14.99) and i downloaded the internet channel as well so i can go on the internet and i think im supposed to be able to play against other people on it too but not done that yet.