Asus ROG Phone 8 mein ek majboot battery hai jo ek shaktishaali 6000 mAh capacity pradaan karta hai. Iske saath hi, phone 88W fast charging capabilities ke saath rapid charging ko support karta hai, jo ek USB Type-C cable ke madhyam se kiya ja sakta hai. Ek poora charge ke saath, istemaal karne wale users ko lagbhag 12 se 13 ghante tak phone ka istemaal karne ki ummeed ho sakti hai.