Charger, vtr : to load, to load something up, to charge something up.
charger qn de qch : to put sb in charge of doing sth, to give sb the responsibility for sth.
charger qn de faire qch : to put sb in charge of doing sth, to give sb the responsibility of doing sth.

The French word « charger » looks exactly like the English word “charger.”

The word “charger” in English typically is used as a noun and refers to “a device for charging batteries.”

In French « charger » is used as a verb and means to load, to load something up, to charge something up.

Les grues chargent le navire.
The cranes are loading the boat.

Ne charge pas la voiture inutilement !
Don’t load the car up for no reason!

Tu devrais penser à charger ton téléphone portable.
You should remember to charge your cell phone.
You should remember to charge up your mobile.

Mon emploi du temps est trop chargé.
My schedule is too busy.