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.

The trap was removed and it contained 1 toothbrush, 1 pen, 1 eyeliner pencil, 1 AA battery, and 2 hair bands.

You have to define what we are talking about here.Average that I see is 30% Operating and Expenses,10% property management,10% vacancy.Every building is different and has it's own set of challenges.If someone self manages they can claim lower operating expenses with no management costs.Although the landlord does use up their time and energy which should have a monetary value to it.I tell landlords when I list their property that we have to count a property management fee in the numbers.If not a majority of the buyers will not be self managing and the numbers won't make sense to them.Otherwise we will be looking to sell to a small group who self manages.It depends on the size of the building as well.Many small buildings like a duplex or quad is self managed.Most larger buildings are not but there are a few.If you go over 50 units you can easily get a 5% property management fee but vacancy can generally run higher at 15% and with 30% O and E still puts you at 50%.I do see some buildings running at 60%.It's because the owners are underwater on the loans and have not maintained the property.They keep having to do patchwork repairs to get by and have high tenant turnover with rekey and reconditioning unit expenses which drives O and E above the 30% mark.If you factor rehab and going in and making changes and charging a slightly lower rent you can decrease tenant turnover and cute repairs to bring inline with the 50% total costs.You just have to look at what you can do with the property.The 50% is only a starting point.

great app...however, if the battery is dead, i'm assuming you're SOL, correct??

Most have lights that run on batteries (a small red light showing it is on and "recording") and they even have motion ones that move in a sweep pattern.

A Nest warning alert in the winter costed the landlord $125 to trouble shoot finding out the battery was low.  

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.