On his moved out day not only he left behind his boat and firewood (he has since moved those), he filled all three carts with trash.I opened up my yard waste yard and I see a fishing rod, regular trash bags, broken glasses, corroded car battery, spic and span and other junk.

You might also take this time, as a reminder, to change the batteries in your thermostat, replace your furnace filter, and clear your air vents to ensure your unit is working to the best of its ability.4) This is also a good time to disconnect your exterior hoses. 5) It is also now time to change the batteries in your smoke detectors.

The ones we have used the most are Schlage models which do not power the deadbolt as they have longer battery life and their are less alignment issues as buildings and doors shift with the seasons.  

I know they all run on batteries so how often do you have to change the batteries? 

Mine has a small battery that takes a few hours to charge and gets about 20 minutes of flying time.

Supply and replace all light bulbs, fluorescent tubes, and batteries for smoke alarms, carbon monoxide detectors, garage door openers, ceiling fan remotes, and other devices (of the same type and quality that are in the Property on the Commencement Date);E.

Ever since then, he won't let me come and do needed maintenance or repairs (e.g. changing smoke alarm batteries) unless he or his wife are home.

Unfortunately, processing power = battery drain.

Utah and was fully self sufficient.Installed 1/2 acre pond,12 ft deep, with rubber liner, 60 ft tall wind generator, auto tracking solar panel system, batteries, a 300 ft deep well, low voltage elec, solar fridge, timber on the acreage, a 24x30 basement UNDER a garage for food storage, sleeping bags, pillows, guns, ammunition etc.

We perform an interior inspection every 6 months and test all and replace batteries and filters as necessary.