If you need to conserve your dying phone battery efficiently, use the built-in tools that your phone already has. On iPhone ...

The Green Battery app is a powerful battery-saver that also doubles as a phone cleaner to get rid ... to reduce app processes running in the background. Estimation of how much battery is left ...

Battery Saver reduces power consumption by restricting background activity, minimizing animations, and enabling Dark Mode. On Google Pixel phones, an Extreme Battery Saver option provides even ...