Abstract: A surgical system including battery packs, a power subsystem and a controller is provided. The power subsystem is configured to connect at least two battery packs in parallel during a backup mode, disconnect the battery packs in a non-backup mode, and prevent each battery pack from charging one or more other battery packs during parallel operation. The controller is configured to individually charge each battery pack to a power capacity equal to or less than a predetermined power capacity, such as 100 Wh.

Abstract: A video overlay device for use in surgical settings to overlay surgical parameters from a surgical console over images from a surgical microscope is provided. The device includes a video input port configured to receive image data from a camera and a data port configured to receive a removable storage device storing encrypted WiFi configuration data. The device further includes a WiFi transceiver configured to connect, based on the encrypted WiFi configuration data, to a local WiFi network hosted by a surgical console and receive, from the surgical console, overlay data. The device further includes a processor, configured to generate, based on the image data and the overlay data, combined image data and a video output port configured to send the combined image data to a display.