HDD encryption vs. battery life

[Dietz Proepper]

Martin Milata:
> Hi list,
>
> I'd like to use hard disk encryption on my notebook (root, home, swap -
> everything). Either dm-crypt or truecrypt.
>
> I wonder what will be the impact on power consumption? Is it noticeable,
> or does it not make any difference at all? Does anyone have any
> experience with this?

If you're not doing massive disk io the effect should be negligible.