What's the difference between the "C212" and "C210" Black Glo Tivo remotes? I believe I have the "C212" because it takes only 2 batteries and the "C210" takes 4 batteries. I need a new remote because the number 8 key doesn't work. The buttons are also more "Plastic" than rubber. Also I bought my TIVO XL Premiere when it first came. Have they changed remotes since then?