recharge your batteries
US /riːˈtʃɑːrdʒ jʊər ˈbætəriz/
UK /riːˈtʃɑːrdʒ jʊər ˈbætəriz/

1.
to rest and relax in order to get your energy back
:
•
After a long week, I need to go home and recharge my batteries.
•
A short vacation is just what I need to recharge my batteries.