This rechargeable battery NiMH from Duracell (RCR Ultra) HR6 AA 1,2V 2,5Ah and is made of high-quality material. This batt is efficient and is friendly for the environment. Duracell developed its industrial batteries especially for the professional market. You can count on Duracell industrial batteries for the reliable, long-term energy provision of all your professional, battery-powered equipment.