Battery Life when Unused

[CourtLechter]

About how long can most of you leave your bike without having the battery drain?

Because of all the rain on the east coast and some personal issues, I ended up not being able to ride for just under 2 weeks...then on a bright sunny day, I went to start my bike, and...nothing: lights were on but silence as I pressed the starter. Prior to that I had gone for a pretty long ride, so I would have expected a reasonable charge beforehand.

I've a battery tender on the way, and I know that if I leave it a while, the battery will always die; but I was sort of expecting to get more time out of it than this...at least during the warmer months.

Thanks!