The Toughest Flashlight You'll Ever Need. Perfect for close-up jobs, the Energizer Hard Case Professional 2AA is always at hand and ready to perform. The compact size makes the light easy to carry and store. An anti-roll design combined with rugged ABS plastic and rubber over mould greatly reduces the potential for damage to the internal components. A shatterproof lens protects the LED from harsh environments. In addition, this light keeps your cost of ownership low with an impressive 50-hour run time on low beam. Useable light for 50 hours in low mode between battery changes (with Energizer MAX batteries), 89 hours in low mode using Energizer Ultimate Lithium batteries.