It has never failed or need batteries replaced.I do use wifi thermostats, wifi water heater and exterior cameras.

There is internet and a fully charged battery... and you eagerly do a search for, "what bait should I use to catch Tuna?"

They recently launched battery operated cameras and flood light cameras to better compete with Ring.

A local to me property just came on the market with a Tesla roof and battery wall. 

However, if you installed a complicated thermostat that is difficult for the average user to operate without a manual, then you should bare some responsibility.Can they just unplug it, remove the battery, and wipe the memory? 

Hello all,I've put solar panels with a backup battery on my primary home within the last year.

Firestone would still sell tires, but oil changes, batteries, belts, and brakes are not used much on electric cars.   

While it is very common for owners to have tenants responsible to change batteries in smokes, furnace filters, light bulbs etc they also need to be smart about it. 

If off the grid, depends on your Battery storage. 

The exceptions would be consumables (light bulbs, smoke detector batteries, etc.) and things you've specifically said (in writing) that you will not maintain.