as a result of an interesting recent thread, i won't be regularly starting & warming my tractor as it sits throughout the winter. only use it when i need it... however, want to keep the battery fully charged (do not have power to the storage area) & don't want to mess with a solar tender, etc. if i were to hook up jumper cables to the tractor battery (w/o detaching terminals to tractor) from my pick up & let my pick up idle for 10-15 minutes, wouldn't this fully charge the tractor battery in the same way as starting the tractor? the battery is good and probably doesn't lose much charge sitting, but thought this would be a convenient way of keeping it in good shape in the winter. your take? thx in advance