Battery health is at 90% it has been 1 year and 5 months .is it normal or should I check it with service centre
its normal bro. just avoid draining the mac battery frequently. you can leave it connected to charger and use it whenever you want to use it with desk setup. and other times you can use it in battery power. if you have applecare+ then yes you can check once with apple service center within 3 years warranty period. but macbook batteries normally come for 4 years and even more for normal usage.