THE CELL HOUSING IS LEAKING FROM THE CAP (BOTTOM OF THE CELL CAP OR THROUGH THE CORD HOLE)
O-ring may be improperly seated
Confirm that o-ring has not been lubricated. Clean the o-ring slot of any dirt or debris. Fully seat the o-ring in into the slot before inserting the cell back into the housing.
Cell cap may be cross threaded
Unscrew cap and confirm that the cap screws onto the housing without resistance.