Searching for Wi-Fi when not available use a lot of battery.
Create a new personal automation that starts when you arrive in an area you know has Wi-Fi. When the automation starts, turn on Wi-Fi. Do the reverse when you leave.
Turn on/off Wi-Fi based on locations
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How to Use NFC to trigger useful shortcuts
Use old credit cards, or entrance cards or buy NFC stickers and use those to start shortcuts.
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7 Useful iPhone Shortcuts and Automations to Try
How to create iPhone shortcuts for low power mode, location-based actions, Wi-Fi automation, and more