Watch this: So Many iPhone Battery Complaints, but Why?
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Surprisingly, the keyboard on the iPhone has never had the ability to vibrate as you type, an addition called "haptic feedback" that was added to iPhones with iOS 16. Instead of just hearing click-clack sounds, haptic feedback gives each key a vibration, providing a more immersive experience as you type. According to Apple, the very same feature may also affect battery life.
According to this Apple support page about the keyboard, haptic feedback "might affect the battery life of your iPhone." No specifics are given as to how much battery life the keyboard feature drains, but if you want to conserve battery, it's best to keep this feature disabled.
Fortunately, it is not enabled by default. If you've enabled it yourself, go to Settings > Sounds & Haptics > Keyboard Feedback and toggle off Haptic to turn off haptic feedback for your keyboard.
For more tips on iOS, learn how to download the new iOS 17 and how to automatically delete multifactor authentication messages from texts and emails.
Source: cnet.com