There may be a battery backup so it could make noise even after you disconnect the power (but 15 years is pretty old for it to still work).

Z Wave uses much less energy for the wireless signal so the batteries in the lock last much longer.

Although I don't know if what you have now is just battery operated or hard wired, that makes a difference.  

batteries?

I live out of state of where my STR will be in, and I'm installing keypad entry for the door but those things run on batteries so I wouldn't be able to go there and change them so it would be good to have an on-call handyman that would be able to do this.

If you have time, hit those sump pumps, batteries, leaning trees, drains and gutters. 

Check out the California Penal Code and look at the defenses to homicide (and also battery and similar crimes, if you want to shoot someone in a non-fatal manner).If found this on the internet - no idea if it is correct or up to date, so please don't rely on it if you decide to shoot someone:http://law.justia.com/codes/california/2009/pen/187-199.htmlHomicide is also justifiable when committed by any person inany of the following cases: 1.

I won't go into detail, but I bought 20 acres next to National Forest in Utah and made it self sufficient: 2 homes, 70' serviceable wind generator, automatic tracking solar panels, a roomful of batteries, a half acre pond (12' deep with rubber liner) and a deep well.It also had a 24x30 garage built OVER a concrete basement of same size with steel door entrance.

I will ensure that there are battery-powered smoke alarms in pretty much every room.

If the remote with delivered in perfect working condition, then the tenant should be held responsible.Maybe it just needs a new battery.. ( LOL )