anirdhan , via OnePlus 3T , Oct 26, 2020 : Received my new Buds z... Before promised date... But the charging case does not retain charge for more than 1 hour or so. Charge drops to 1% even without charging the buds fully. Have been trying call the support numbers but even after half hour of wait I am not connected to any person to discuss. I have raised an RMA on the website but haven't heard back from them either.