Note: this API is deprecated, but still works in some browsers. https://developer.mozilla.org/en-US/docs/Web/API/Battery_Status_API#Browser_compatibility data:image/png;base64,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Note: this API is deprecated, but still works in some browsers. https://developer.mozilla.org/en-US/docs/Web/API/Battery_Status_API#Browser_compatibility

valueindexlist

data:image/png;base64,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