The present disclosure relates to battery cabinets and other power or electronic apparatuses comprising batteries, more particularly, to a tray configured to expand to accommodate different orientations of one or more batteries. A tray configured to contain one or more batteries, comprising a primary base; a secondary base; a first sidewall; a second sidewall; a back wall; a first vertical extension; and a second vertical extension; wherein the primary base is disposed on top of and aligned with the secondary base, wherein the first sidewall and the back wall are coupled to the primary base, wherein the second sidewall is coupled to the secondary base, wherein the back wall is perpendicular to the first sidewall and the second sidewall, wherein the first vertical extension is coupled to the first sidewall, and wherein the second vertical extension is coupled to the second sidewall.