Enabling ad and tracker blocking in a mobile browser can significantly reduce CPU/GPU load and network processing. Studies show that compared to browsing without ad-blocking, turning it on can save around 20–40% of battery usage.
For example, if a phone normally consumes 100 mAh during a browsing or video task, with blocking enabled it may use only 60–80 mAh. Over time, this helps extend battery life and reduces how often you need to charge your phone.
FAB (Free Adblocker Browser) lowers CPU usage by blocking ads, which helps reduce phone heating and battery drain — especially useful for older Android devices.