One of the first upgrades was battery backup sump pumps with audible alarms.  

You can just add this in the description on airbnb.My neighbor has the battery powered cameras and he has found the batteries need to be changed much more frequently than he imagined as there is always a lot of motion triggering the camera.I have a commercial system that powers the camera by the same ethernet cable they are plugged into.

I can remotely keep an eye on my house and get a discount on my insurance.I have the hardwired ones so I don't have to worry about replacing batteries.

If a TV remote's batteries die, you need to hope you have batteries.

When i do construction the inspectors want the smoke alarms hard wired, with battery backup.

Then, sometime last year, someone stole an expensive wilderness camera and battery he had set up near the trail.

Light bulbs, batteries (all sizes), trash bags, cleaning towels, ice melt, etc.Hope this helps.

Recently Ford announced a $5.6 Billion Investment in the Memphis Regional Megasite for one of the largest battery and vehicle manufacturing campuses in the U.S.

Hyperion is a company that makes hydrogen fuel cells, and Forsee power is a French-based EV battery company that will be setting up its North American HQ in Hilliard. 

Hey TimWe use a Schlage Encode deadbolt with Energizer Ultimate Lithium batteries.