Check Battery Usage:

Settings > Battery > Usage shows consumption by app. Identify which apps drain the most. Address the biggest consumers first.

Restrict Background Apps:

Many apps run unnecessarily in the background. Limit background activity in app settings. Social media apps are common offenders.

Lower Screen Brightness:

Display is the biggest battery consumer. Use auto-brightness or manually reduce levels. Every bit of brightness reduction helps.

Disable Unnecessary Features:

Turn off WiFi, Bluetooth, GPS when not needed. Location services are particularly power-hungry. Enable only when necessary.

Update Apps and System:

Outdated software may contain battery bugs. Keep everything updated for optimization improvements.

Check Battery Health:

iPhone: Settings > Battery > Battery Health. Batteries degrade over time. Under 80% capacity indicates replacement need.

Conclusion:

Screen and background apps consume most power. If battery health is poor, replacement is the only permanent solution.