Phone Brightness vs. Battery Drain: A Real-World Test

How much does your phone’s screen brightness actually affect battery life? In this hands-on test, you’ll measure battery drain at several fixed brightness levels using simple, repeatable tasks that mimic normal use (like playing a downloaded video on loop with Wi‑Fi off). You’ll log battery percentage over time and compare drain rates across brightness settings. The procedure avoids specialized apps and focuses on careful timing and consistent conditions so families or classrooms can run it safely with everyday tools. You’ll build a small dataset, make a graph, and decide how much brightness is really worth it.