I searched, but couldn't find an answer, so if it's already been answered, I apologize in advance (I know how unforgiving this forum can be...)

Anyway, I'd like to get a keyboard for my n800, however I'm stuck on whether to get a USB or bluetooth keyboard. One of the things I'd like to take into consideration is the power consumption of both of them. I normally keep bluetooth off, because I don't otherwise use it, so I'm sure bluetooth would have an effect on my battery life, but would USB ocasionally have a worse effect?

Thanks to anyone who can help!