The Energizer MAX family was made by the company to make sure that Energizer delivers on its promise of providing the longest lasting batteries to their customers. When it comes to a reliable source of power that has been dependable for decades now, no other company can beat Energizer. Their MAX family of batteries makes absolutely sure that Energizer retains its top spot in the industry of battery technology. Their innovations resulted in the formation of the world's first every mercury free battery. From that point on, Energizer has always been at the forefront in providing better and better battery technology to the world. Among their family of excellent batteries comes the Energizer AAA BP-4. With 4 batteries in the pack that have a shelf life of up to 10 years, you can buy yourself as many of these, store them and forget them. In any case of emergency, you know you're covered for AAA power source for your appliances whenever you will need them.