Nothing outlasts the long-lasting power of Energizer Ultimate Lithium AA Batteries. Each battery's safety-conscious, leak-proof design (based on standard use) gives you confidence that your most-loved, most-critical devices are protected against leaks and corrosion. These batteries can perform in extreme temperatures (from -40?C to 60?C) AND last in storage for up to 20 years? making Ultimate Lithium batteries the clear choice to dependably power the essential devices in your life.