Discord in particular is a horrible battery hog—we used it a lot over the worst stretches of the pandemic in my social group, and it was constantly killing laptop batteries that could reasonably last 8+ hours, in like 3 hours flat. I've always had to avoid Electron (and leaving enormous web-apps open all the time, like Gmail) and use Safari to achieve (or sometimes exceed—they're relatively conservative about it) Apple's battery life claims. Unfortunately, a handful of common programs seem to be the equivalent of having your computer to find more digits of Pi constantly, on all cores, while what they're actually doing justifies maybe 10% of their actual power use. Mostly, it's webshit doing it.