Your Android is running background tasks you never approved and this one setting kills them

I pulled up my phone’s battery stats last week and noticed something odd. Apps I hadn’t opened since morning were still listed as active in the background. No notifications, nothing visible on screen, yet they were burning battery anyway. I started digging into how Android handles apps once you leave them. Turns out, a single setting inside a hidden menu puts a hard cap on how many processes your phone keeps alive.