: You can sometimes reset the particle counter by charging the device for 30 minutes or removing the battery for 15 seconds while the unit is off.
: The Battery Management System (BMS) can "lock" if cells drop below a certain voltage. This firmware-level shutdown is designed for safety but often forces users to buy a new battery rather than repairing individual cells. Managing Your V15 (No App Required) dyson v15 firmware update upd