hi. i was trying my power cover to work on SP2. I dont really know its history as the unit was given to me. But these are clues and maybe somebody cans see whats wrong with it. 1. The unit was given to me in this state - power cover's battery function is not working. Then, SP2 would displayed 2 batteries. But the power cover battery would have a 0% charge (plugged in, not charging). Keyboard works though - Device manager Firmware would have it as Firmware Resource Firmware Resource Firmware Resource Firmware Resource 2. I sensed that it could be driver issue so I downloaded the July 2014 FW and manually installed most of the FWs. It is now in this state Device Manager Batteries Microsoft AC Adapter Microsoft ACPI-Compliant Control Method BatteryFirmware Firmware Resource Surface Pro Embedded Controller Firmware Surface Pro System Aggregate Firmware Surface Pro UEFIKeyboards HID Keyboard Device Surface Type Cover Filter Device 3. No pending Windows 8 updates. Although on the update history, I dont see any history of Surface FW updates. The closest thing to that are MS-Other hw-Touch Cover trackpad settings and MS-Keyboard-Surface Type Cover. 4. Battery tray only reported 1 battery. This is all I can think of. Tried practically everything suggested on the web. Thanks.