iPhone 12 Pro Max Battery Drop and Unverified Issue

I accidentally dropped my iPhone 12 Pro Max from a low height. Since then, the battery percentage fluctuates abruptly, dropping from around 80% to 1%, despite the battery health indicating 97%. It occasionally reaches 0% and shows an “Unverified Battery” warning. After some time, the battery percentage returns to normal, but the problem continues to repeat intermittently.