A super cell housing is configured to support cylindrical electrochemical cells in a highly volumetrically efficient arrangement. The super cell housing includes a first tray (430) and a second tray that (431) cooperate to secure the cells therebetween. The first and second trays (430, 431) are identical, and include a base (432) having a cell-facing surface (433) and an opposed outward-facing surface (434), and a sidewall (435) that surrounds a periphery of the base (432). A sidewall inner surface has concave contours that each define a portion of a cylindrical surface. The base (432) includes protrusions (441, 442) that extend in a direction normal to the cell-facing surface (433) and are surrounded by the sidewall (435). Outer surfaces of the protrusions (441, 442) having concave contours that each define a portion of a cylindrical surface. The concave contours of the sidewall (435) and the protrusion (441, 442) cooperate to form cell-receiving openings. At least one of the protrusions (441, 442) includes a through hole that opens at the outward-facing surface (434).