Seeking for extremely durable Alkaline batteries that last much longer than common ones? NANFU is bringing what you want as one of the world-class battery cell production experts. NANFU Alkaline battery develops to be our matured best seller for decades, thanks to the massive effort of the excellent research and development teams for over 30 years. Easily power up all the household small electronic devices requiring double-A batteries. Strong power (up to 1.5V) is adaptive to provide different amounts of energy for different devices, ideal for both high-drain and low-drain ones. Store up to 10 years (tested under IEC battery standards) to lock the power within the tiny body, ready to serve at any time you want. Double leak-proof design seals the batteries well to protect the devices. Contains no lead, mercury, or cadmium for environmental protection. Use them throughout the whole year with a working temperature varying from -20 to 50. Note: Theyre disposable and non-rechargeable.