and have it suddenly stop working, because these are special batteries that need to be recharged about every 20 minutes.
(these; are; special batteries that need to be recharged about every 20 minutes) (special batteries; need; to be recharged about every 20 minutes) (special batteries; to be recharged; about every 20 minutes)
these special batteries special batteries
are need to be recharged
special batteries that need to be recharged about every 20 minutes
to be recharged about every 20 minutes
about every 20 minutes