The lock uses AA batteries and the last a year or so.Definitely get a grill and patio furniture.

Electronic Lifts- disconnect the battery if leavingfor long term storage.K.

Few other Odd bits of info:Another note, this is both a surge protector and a battery backup for the camera system.Below is the latest camera we added for one of our unattended locations.

It is default in the lease that we are responsible for maintenance in the lease.Going forward we are going to have a handyman coming through once a year changing out smoke detector batteries and air filters while also keeping an eye on the property for us.We are working on setting ground rules for future rentals to make sure it is clear.

No tenant has ever forgotten or discounted a landlord who calls them up in mid-December to take $100 off next month's rent.One of the best reasons to have regular battery-power smoke detectors and carbon monoxide detectors in your rentals is that they give you an excuse to enter and do a casual inspection when you replace those batteries twice a year.

@Owen MitchellIf you buy on ebay I'd try to make sure that the batteries are still good and not too old. 

Just had to take off the front panel and it looked like a battery that just needed to be unplugged and replaced.

He releases modules super slow, so I had no idea if later info would be useful.

During the prepurchase inspection I noticed the battery low message on the thermostat.

Duplex is in Battery Park.