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Firefox/46.0
Build Identifier: 

In /etc/cron.hourly/0anacron , there is a check

test -x /usr/bin/on_ac_power

that does not start the anacron jobs if the computer runs on battery.

This is neither documented nor expected. Also, the check depends on the
existence of /usr/bin/on_ac_power , and few will know that as soon as
/usr/bin/on_ac_power is installed, the anacron jobs will no longer start when
the computer is on battery.

This check, for each job, should instead be made by the user. 

Reproducible: Always

Steps to Reproduce:
1. add anacron job
2. start anacron
3. run computer on battery
Actual Results:  
the jobs does not start if computer runs on battery

Expected Results:  
the jobs start if computer runs on battery