Enable 120Hz Refresh Rate on Power Saving Mode in OneUI 3.0
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HTC Extreme power saving mode 2.00.933559 APK Download by HTC Corporation - APKMirror
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Getting Rid of That Annoying Power Save Mode Icon on an Android Phone! - Instructables
How to customize Android's built-in battery saver mode : r/Android
How To Save Battery On Android Phones
Request] ULTRA POWER SAVING MODE - like on Samsung - for when you're at like 5%, +500 miles away from a charger, and still need basic phone utilities. : r/jailbreak