JAR Systems Active Charge Power Bank 4-Pack with Microsoft Surface Connectors 4-PackCharge Devices Anywhere with Active Charge: a dependable power solution designed for classrooms, offices, and remote learning environments. The JAR Systems Active Charge Power Bank 4 Pack with Microsoft Surface Connectors 4 Pack delivers portable, on demand power so work never has to pause due to a depleted battery. These multi pack power banks are purpose built to keep Surface devices and other USB powered equipment ready for action, enabling