how big do we require on smartphone camera

The Megapixels camera on smartphones is getting crazy and crazier. With the latest 108 Megapixel camera on Samsung Galaxy S20 Ultra, the world smartphone has become mirrorless camera as again.

The latest Huawei P40 also try to rival Galaxy S20 Ultra with its 52 Megapixel camera powered by hexedeca Bayer configuration, which should making them get closer to galaxy S20 Ultra
The most important concern is on how big is the battery required to have a long run taking photo and video without need to charge frequently. It will be a little bit inconvenient for sure.