prelink-0.3.6-3 It should check whether it's on battery, or on AC before starting the prelink job (in this case, it was anacron that started it).
That should be cron/anacron's duty to check that (and perhaps have some way how to find out what can and what can't run on battery power). Changing every cron script to handle this itself is a bad idea.
This is the same problem as in bug #125779.
*** This bug has been marked as a duplicate of 190268 ***