Hello, I’m not sure but maybe the sites you using in it cause this? I mean if you use your site mostly (community.blackiron.dev) with DarkPixlz's Modern Theme that is maybe need some more energy because that use backdrop-filter: blur on lot of elements can cause battery drain issues.
Can you try to not use this website on DiscourseHub for a day or change the theme which not use backdrop-filter: blur or someone here use it for a day to check this?