ST3D106. MAGLITE® LED FLASHLIGHTS 3 Cell D-Batteries MagLite® LED flashlights utilize a high performance LED beam for a powerful performance with extended battery life. High Performance LED and projecting LED beam easily adjusts focus by rotating the head. Balanced Optics™ combine a highly refined reflector with a new performance enhanced LED, yielding high output intensity. Intelligent Energy Source Management helps balance high brightness with extended battery life.