After that first meeting, I went and checked the county criminal records on him and he had just been released from jail where he was put for assault and battery.

You can also get detectors now that have a 10 year battery.

BTW: ALL laptops have a Three prong plug to the battery charger and a unique cable from it to the laptop. 

I put ten year sealed battery smoke alarms (and CO if there is gas) now. 

The battery gives up about halfway through the night.I don't think $14 is too much to pay for the security of lights.

This means they pay for things like light bulbs, batteries for smoke detectors, etc.

-Change smoke and carbon monoxide detector batteries at move-in.

Did they use used/reconditioned parts to save on costs?

Make sure you get the proper kind to meet code.Some are battery only; some are AC-powered with battery backup; some are "interconnected signalling" (one goes off and all alarms in the house go off).

You can move much faster that way than writing things down IMO.And if you visit REO properties that have no electricity turned on, a flashlight is a MUST.And a spare set of batteries for all of your electronics; having a dead battery at a site visit is terribly inconvenient.