Say phones are roughly 8mm thick nowadays & have roughly 20 hours or less screen on time - making them .5 thicker doesn’t equate to 7 times more capacity. Duracell brought out a mammoth of a brick that had decent battery in 2019.

https://www.theverge.com/circuitbreaker/2019/2/26/18241117/energizer-power-max-p18k-pop-huge-battery-phone-mwc-2019