I recently noticed that when my charger is connected to my laptop it makes a buzzing noise thats quite loud but you need to get your ear close to hear it. when i disconnect it from the laptop it stops, it does work and i dont see an issue with the charging, it should be emphasised that i changed my last battery because it got swollen, also i have a friend who has a year older blade (2020) and it also has a noise but not as loud as mine
thanks