on 28-05-2021 10:58
on 30-05-2021 17:29
@Khilz - here are some comparisons between this phone and the battery life observed depending on the display settings, in case that is not helping.
If it's a new phone, and you're using the correct charger for it (not an older charger off the previous phone), then, as it's new, it should still be in warranty and you may need to reach out to the manufacturer directly to see if there's an update that you need to download to improve the situation.
Here's a couple of tips off a quick Google search to get you started.
Good luck!