How to get battery usage since full charge android programmatically? - Stack Overflow
Battery usage data isn't available on Android (FIX) - Mobile Internist
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Solved: battery usage not showing - Samsung Members
Here is how to fix the battery usage not showing up since 1st January 2021 on OneUI 3 devices. After deleting the app data wait a few minutes and you should see
Battery usage data is not available..... — Nokia phones community
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battery usage data isn't available
On Android phones, why doesn't battery usage add up to 100% under Settings - Battery? It only sums up to 60% or so. - Quora