A casual farewell meaning 'take care' or 'stay well,' used between friends or people who are close.
じゃあ、またね。元気でね。
Okay, see you. Take care.
入院する友達に、『元気でね』とメッセージを送った。
I sent a message to my friend who was hospitalized: 'Take care.'
長期の出張に行く同僚に、みんなで『元気でね』と言った。
We all told the colleague going on a long business trip, 'Take care.'