They just need to change the battery once in a while.

They stole my window A/C and the plastic piece that holds the batteries in my thermostat, and they took their clothes, but everything else is still there.So I sent a text message: "Should I take these keys as an indication you do not intend to come back?"

Filters, bulbs & batteries are new or working @ beginning of lease & tenant is responsible for replacement @ tenant expense as necessary.

Or keyless entry - if you do that, who changes the batteries every 7mo?

Runner: They can help with taking out the trash, switching batteries, light maintenance, bringing in packages, help to set up properties, and more! 

Although I guess Tesla is building a battery factory, and not a car assembly factory.You'd guess that it should grow up with the factory! 

Bass fisherman need space to park their boats and electrical outlets to plug their trolling motor batteries into every night.

The tracker eats your battery.  

No maintenance other than batteries once a year and throw it away if it acts up.

You keep power on, smoke detectors that aren't battery operated will need to be active.The cost for power in the unit will be minimal you can unplug fridge, leave door propped open.Call your utility company, you should be registered as landlord for the property and in between tenants the power is reverted back to owner.You may be able to download the forms from your power company and or fill in online, or fax, each time a tenant moves in and when they move out.