On Tue, 25 May 2010 11:33:24 -0600, "Jim" nospam@wherever wrote:

Hello... I am storing a few rechargable whipper snipper batteries in my
garden shed along with other assorted batteries. I want to time my charger
to give them a charge say 1 day every two months or maybe one day a month. I
know if I go out to the shed and just plug the battery charger in I'll
freaking forget about them and they'll charge for a freaking week before I
remember. (I'm 51 and my mind is toast...70"s were real good to me lol)
Anyways...I googled "monthly timer" etc and found nothing that would
help... is there a 110 volt timer that will do something like this? If you
run across this would you mind posting a link? Thanks folks.. Jim

There are wall switches with a weekly timer. You can have it turn on
an outlet for 10 minutes a week.

You can also use standard mechanical timers. Have it turn on for one
hour every 24 hours and when it is on have it power another such timer
that will turn on for one hour of every 24 hours of elapsed time, and
run the charger off of that.

So the first timer will run all the time, and the second timer will
take 24 days to cover 24 hours. So the charger will be on one hour
every 24 days.