The ornamental design for a portablelamp with detachablestand, as shown and described.
FIG. 1 is a perspective view of the portable lamp with detachable stand.
FIG. 2 is a front elevational view of the portable lamp with detachable stand in FIG. 1.
FIG. 3 is a left-side elevational view of the portable lamp with detachable stand in FIG. 1; the right side elevational view being a mirror image thereto.
FIG. 4 is a backside elevational view of the portable lamp with detachable stand in FIG. 1; and,
FIG. 5 is a top plan view of the portable lamp with detachable stand in FIG. 1.
The broken lines are for illustrative purposes only and form no part of the claimed design.