Obviously it is regular usage and not heavy usage, to last 2 day it must consume 0,62 Watts per hour (so that is idle, maybe check the notifications a few times)
2D games may last around 12 hours while 3D light games 8 hours and 5 hours for heavy android games
PC Emulation of heavy titles like Cyberpunk can get 3 hours but need to be cooled to last so long without throttling
It is not magic, a phone can not 20x the battery time of the NS2