I Haven't really used my Pokewalker yet.
If i do, I Leave it in my Pocket. and even when i Drive to school or something, The press of the pedal, and every bump, or the slightest movement gives me steps.
I got like 1000 steps on it driving home from my Grandparents.
Only time i used it.
And well, Yeah, Hopefully you got Warranty. D: