充电 literally means 'to fill with electricity' — 充 (chōng) means 'to fill' or 'to charge', and 电 (diàn) means 'electricity' or 'electric charge'. Its primary, concrete meaning is to restore electrical energy to a battery, as with phones, laptops, or electric vehicles. This usage is extremely common in modern daily life.

Figuratively, 充电 has become widely used to describe mental or physical rejuvenation — like 'recharging one’s batteries' in English. People say they’re going to 充电 when taking a break, learning new skills, resting, or engaging in relaxing activities that restore energy and focus. This metaphorical use reflects how deeply technology has shaped everyday language, especially among younger speakers and in workplace or self-care contexts.