By not motorizing the extension and retraction of the deadbolt, battery life is much longer and you do not need to worry about the deadbolt sticking if the door and jamb are a little out of alignment as the building shifts with the seasons.We've had some of these locks in-place for 5+ years.

Some with extra features may require batteries.

1) standardize to one battery type for your power tools 2) impact driver 3) fluke multimeter

Jason, it is an alcove studio in Battery Park City (so a doorman building) and while there have been minor repairs (replacing broken appliances, spot repairs to the parquet floors), as far as I can tell the floor, bath and kitchen are all 80s originals beyond those small updates.  

Or is there always a battery component to it? 

Reach out to a KW office near you to ask if you can sit in on one of their IGNITE modules. 

In fact, their training module that does just that is actually called IGNITE.I have been with KW for over 20 years (in May it will be 21). 

They are all battery powered now, no wires!

They are small and run on batteries.

You buy it one time and then no more money unless you want to upgrade another new module on to it.