Assertion: alarm's battery | /r/HasProperty | easy to install
Facets:
Source sentences:
text: The buoy requires a 9-volt battery, which is easy to install and is supposed to last roughly one year, depending on how often the alarm sounds.
text: The Pool Patrol PA-30 floats on the surface of the water, and it uses one 9-volt battery, which is easy to install under the rotating base.