Assertion: electric toothbrush's brush head | /r/HasProperty | battery
Facets:
Source sentences:
text: You can buy a brush for $40, then opt in to automatic refills every 3 months, which cost $15 for a new brush head, battery, tube of toothpaste, and floss.
text: The brush heads are replaceable like the batteries and both need replacing at approximately 3 month intervals.