Energizer E92BP4 Max Alkaline AAA Batteries (Pencil Cell) are Up to 50% longer lasting. Energizer's # 1 longest-lasting MAX™ thanks to new improvements. Designed to protect against damaging leaks for up to two years after fully used. Hold power for up to 10 years in storage. From the makers of the world's 1st* Zero Mercury AAA Alkaline Battery: Energizer is an industry leader in powering people's lives responsibly. PowerSealTM Technology protects* your devices from damaging leaks. Nominal Voltage: 1.5 volts. Shelf Life: 12 years at 21°C.