charge up
Fill the battery
Charge up means to restore power to a battery or device: I need to charge up my phone before we leave.
It also means to energize or excite someone: The coach's speech really charged up the team.
The "up" adds emphasis or completion to the basic sense of charge—filling something with energy, whether electrical or emotional.
pump up
Increase air pressure inside
motivate · inspire · enthuse · electrify · galvanize · rally · rouse · stir up · get going · energize
battery
Portable electricity storage
plug in · top off · fuel up · restore · revitalize · rejuvenate · refresh · renew · replenish · reinvigorate
charge updeflate
Release air from
discourage · calm down · wind down · demoralize · bring down
charge, discharge, charged, charges, charging, discharged, recharge, overcharge, recharged