My phone is about 6 months. There was one time when i checked the battery health it has gone down to 98% so i tried to follow advices on how to prevent battery health from draining like turning off background refresh app, turning on optimized battery charging and many others. Few weeks later when i checked the battery health it goes back to 100% i was really confused but okay. Fast forward to few weeks, i checked my battery health it’s 98% again like what is happening? A month has past and now it’s down to 97%. What should i do about it? Help please.