We almost came close to buying the Blink XT-2 cameras but then the reviews on YouTube mentioned that the batteries don’t last for more than a couple months at a time.

My biggest complaint with iPhone is battery life.

Check to make sure my pool safety equipment is working, test the pool alarm, check batteries in all the remotes.  

No battery. 

Clean again to wipe off dust.I used "Zinsser Cover-Stain" primer; this stuff is thick and smells like battery acid.

I asked about night use and they quoted me a tesla battery so I can store the energy and use it at night.

Because the batteries are easily removable, I'm a little concerned that tenants will try to hack the system by removing them.

The batteries in my crystal ball are running low.

Not $11 to change batteries in a smoke detector.  

If the place looks rough, they are going to look closer.I always bring my tool bag and a couple of extra smoke detectors and batteries because I don't know if the city actually changes their rules that often or if it's just inspectors that change what they think the rules are but it seems locations are always changing-inside the bedrooms, outside the bedrooms, by the kitchen, nowhere near the kitchen etc.