The inspection failed for missing  smoke detectors [the tenant took it down when it started beeping] no fire extinguisher and carbon monoxide detectors missing batteries.

You could download the app and upload the reports when you get back to the office to save on data and battery.  

We always check smoke alarm batteries and filters, and one of our longer-term tenants now actually leaves post-it notes around the place saying, loose closet door, or wobbly fan, and we fix anything minor that we can take care of while there.  

It's all battery powered except for the base station which has a battery backup.

Seems like you ought to be telling US what results you get rather ask us to predict your future.My crystal ball has an old Ray-o-vac battery and is leaking some kind of fluid so it's up to you, buddy.

A way to keep an eye on the property is to perform routine maintenance like changing the filter in the furnace (which a tenant will almost never do on their own) and changing the batteries in the smoke detector. 

That in and of itself isn't a problem but it is battery powered and therein lies the rub.I would check and see what the battery percentage is when it goes offline.

Just something else to break/need batteries/be improperly operated and create lock outs because of auto locking.

@Frank RizzoThe only smart locks I have experience with are battery operated that do not require wifi.

All the EV battery companies and plants coming in are having a widespread effect on the city as a whole. 3.