Icon with one filled square in bar and up-down arrows and 24 pixels (small size). Indicates very low level, minimal value, first-tier charging capability, low-medium power transfer, or first stage. Indicates vertical movement, height adjustment, y-axis operations, plumb positioning, or longitudinal calibration procedures. Used in status, table rows, content creation, editing interfaces, and user interaction systems, where small sized icons are required. Used in status, table rows, content creation, editing interfaces, and user interaction systems, where small sized icons are required.