Energizer's #1 longest-lasting AA battery. Leak-proof construction protects the devices you love (based on standard use). Powers your most critical devices—ideal for your smart home devices, outdoor surveillance systems, digital cameras, and handheld games. Holds power up to 20 years in storage for trustworthy backup energy, so you’re always prepared. Performs in extreme temperatures, from -40°F to 140°F, for year-round, indoor and outdoor use.