<page_title> MacBook (2015–present) </page_title> <section_title> Technical specifications </section_title> <table> <cell> 29 Watt USB 3.1 Type-C power adapter, 39.7 Wh battery <col_header> Early 2015 </col_header> <row_header> Power </row_header> </cell> </table>
MacBook uses a 39.7 watt-hour battery.