Battery Saver is a feature found in many electronic devices, such as smartphones and laptops, designed to extend battery life. When activated, it reduces background activity, limits app usage, and lowers screen brightness, helping to conserve energy when the battery is running low. This feature is particularly useful for users who may not have immediate access to a charger. By optimizing power consumption, Battery Saver allows devices to function longer, ensuring that essential tasks can still be completed even when the battery percentage is dwindling.