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Battery life and performance notification

Just recieved a notification stating that my battery life and performance have decreased and that I should contact the nearest service center. Is it actually necessary to do so? How significantly would my battery life have decreased, coz just today I got 4 hours of SOT on Medium power saving mode. I hardly get 4 hours on my phone ever since I bought it too. My is an Indian version with Exynos. Also if anyone else has recieved this notification, can you tell me what you did about it?