Members Helping Members - Educating, Informing, Supporting
Actually Steve this is what they do. Tiles last a year. We'll remind you when it's time to order new Tiles and send you an envelope to recycle your old ones.
Granted a battery might be better for some people but trying to put a battery in something that small for most people wouldn't be a better option in my opinion.
I still think it's a cool idea but point well taken. :)
Also forgot to mention how hard it is for some people to hang on to something that small for even a year, that's why I think it's so inexpensive as well.