I changed these 7 settings on my Samsung phone to extend the battery life by hours

This ZDNET guide outlines seven ways to maximize battery life on Samsung Galaxy phones, including enabling Dark Mode and Adaptive Brightness, uninstalling or limiting background apps, identifying power-draining apps via Battery and device care settings, downloading media and maps for offline use, scheduling the Always-On Display, and selecting the Light Performance profile; it also provides low-battery measures such as turning on Power Saving, disabling data roaming and location services, and switching off AOD.