Hi, I have implemented HID Power Device (Battery as HID) on STM32L0. I need only proper report descriptor and report to send to windows. I have got working report descriptor from http://networkupstools.org/protocols/mge/NUT_MGE_USB_Devices_Draft_AA.pdf , but I can't create proper report to send it to windows. I downloaded HID Tool to create report descriptor (I took pwr example), but windows says that "Report Descriptor was not byte aligned". Did you ever create HID Power Device on STM32 and could you share report descriptor and report? OR maybe do you have some UPS with HID and could you send me report descriptor and messages from USBLyzer?