To set your Apple device to charge-only mode, you can follow these steps:
First, connect your Apple device to the onboard USB port.
Then, swipe the screen on the device to unlock it and access the Settings menu.
Next, find the \"Battery\" option and click to enter.
In the battery Settings, you will see an option called \"USB Access.\" Tap to access the option and select \"Charge only\" mode. In this way, your Apple device will only be able to charge via the onboard USB port, not for data transfer or other functions. Please note that specific menu options may vary for different Apple device models and operating system versions.