A. 1. Limit background app refresh: Go to Settings > General > Background App Refresh and turn it off for Locket Widget to save battery.
2. Reduce screen brightness: Lower your screen brightness or enable 'Auto-Brightness' in Settings > Display & Brightness to conserve battery life.
B. 3. Close unused apps: Regularly close apps running in the background to reduce battery drain. Double-tap the Home button (or swipe up) and swipe up on apps you want to close.