How can users improve the battery life of their Apple devices?

The option that emphasizes lowering device brightness, managing app usage, and using Low Power Mode is the most effective approach for improving battery life on Apple devices.

Lowering device brightness can significantly reduce power consumption since displays are one of the most energy-intensive components of smartphones and tablets. Managing app usage by closing unnecessary apps running in the background also helps, as these apps often use resources that drain battery life. Utilizing the Low Power Mode feature further extends battery life by disabling or reducing background activities, visual effects, and certain tasks that consume more power when the battery level is low.

The other options suggest methods that do not contribute positively to battery health or efficiency. Continuously charging devices can lead to overcharging, which may diminish the battery's lifespan over time. Disabling all applications would limit the device's functionality and user experience, rendering it nearly unusable for everyday tasks. Keeping the device in airplane mode at all times eliminates connectivity, which can be impractical for users who require access to calls and the internet, and while it does save battery, it is not a realistic long-term solution for general usage. Thus, the first option remains the best advice for extending battery life effectively.