Battery capacity on Iphone 11 Pro Max

Hello. I bought this iphone 1 November 2019. Iphone 11 Pro max 256Gb. Last month my battery capacity is 98%. Is it normal? Im not using to play games with my Iphone. just surfing and watching videos.I had Iphone 7 plus. after 5-6 month it was 100% capacity. maybe my battery defective?