On May 25, 4:04*pm, "Bob F" wrote:
Just get a mechanical twist timer. As you walk by once in a while, give it a
twist. The chargers will run for an hour or whatever you set it to, then turn
off. You can probably get one that will go up to 24 hours if you need.

You could use a sprinkler timer switching a relay to the power.

That's just replacing the burden of remembering one thing with
remembering something else. His problem is remembering, period. Net
gain, ZERO.

Here is a solution:

Hook any old daily timer to a MECHANICAL 7-day timers in series.
Program the daily to run 6 hours a day. Program the 7-day timer to run
one hour a week.

End result will be one hour of power every 4 weeks.