What is the SC card slot all about?

Storage-wise, there is only one PCIe x4 slot And in terms of battery, HP has equipped the notebook with a 56Wh unit

1 Nano Security Lock Slot 1 Smartcard reader Configurations of the HP EliteBook 840 G9 that are ENERGY STAR® qualified are

hp slot How to Use Sim card in HP Laptop Elitebook 850 G6

hpe 5945 2slot switch How to Use the Built-In Card Reader on an HP Laptop Part of the series: Computer Help