The All New Maglite XL100 LED Flashlight is a great piece of kit.

A revolutionary breakthrough in flashlight technology, designed for optimum light output, the new MAGLITE® XL100™LED flashlight delivers user-friendly, performance oriented features in a sleek, tactical design. Engineered from the ground up, this advanced lighting instrument is driven by the next generation of MAG-LED® technology and includes the Advanced Flashlight User Interface™. The Maglite® XL100™flashlight features a push-button tail cap switch with (5) selectable modes, plus lockout (prevents accidental operation).

• Normal Mode (Basic On-Off)
  Adjustable Brightness with Memory
• Strobe Mode
  Adjustable Strobe Rate with Memory
• Nite Lite™ Mode
  Automatically Dims to a Low Setting
• Signal Mode
  User initiated signal on-off
• SOS Mode
  Signals International Morse Code SOS 
• Plus: Lockout
  Prevents accidental operation
• "Spot-to-Flood" adjustable 
  LED beam
• Anodized for corrosion resistance and durability
• Rugged, machined aluminum case
• Compact tactical design
• Intelligent Energy Source Management - continuously monitors the balance between high brightness and efficient power usage allowing for prolonged battery life
• Individually serial numbered
• Powered by three (3) alkaline batteries