Recently bought Samsung S9 Ultra. Its battery performance and charging is quite disappointing. it takes about 04 hours to charge fully and then lasts for 5 to 6 hours of continuous use. I most of the time use galaxy notes in split screen with a book pdf or vlc for lecture. Cable is original with adapter of 45W, new. It shows superfast 2.0 fast charging (in settings, in battery history, it still shows fast charging in green colour rather than super fast in blue) but still take a hell of time to charge about 20% in an hour or so. Brightness is also about 25%. How can I improve charging and battery timing?
