While most operating systems have built-in "Battery Saver" modes, they often lack the diagnostic depth required to prevent long-term degradation.
You can compare your device's original design capacity against its current "real" capacity to see how much it has worn down over time. Top Battery Managers to Download download full battery manager
A dedicated battery manager goes beyond basic system indicators to provide deep analytics, safety alerts, and automated optimization. Why You Need a Full Battery Manager While most operating systems have built-in "Battery Saver"