Thanks to high quality manufacturing and materials, including Super Conductive Graphite technology in the cathode, Procell batteries provide long-lasting power and outstanding performance. Each battery is tested for voltage and leakage before release to ensure dependable power - even after up to seven years of storage. And they can operate in temperature extremes between -20°C and +54°C. Procell batteries are ideal for applications such as torches, telemeters and measuring instruments, microphones and medical devices. Procell packaging is designed to accommodate the needs of professional users with very large battery consumptions, such as hospitals, steel mills and TV stations. For ease of use AA and AAA batteries come in reclosable packaging.