Is 78% of Apple battery still usable?

Can be used. According to Apple official website, the battery health of Apple's mobile phone is 78%, which will not affect the normal use of the mobile phone. Apple is a high-tech company in America. It was founded by Steve Jobs, Steve Wozniak and Wayne Tam on 1, 1 in April, 976, and was named Apple Computer Company of America. 2007 10/9 changed its name to Apple, and its headquarters is in Cupertino, California. Apple is an apple company.