Duracell believes there is no limit to the potential of portable power and it always strives to find innovative and efficient ways to power your life. Duracell MN21 a source of electricity for self-contained power supply of various devices. Batteries Duracell MN21 belong to a series of alkaline batteries from Duracell Batteries with increased capacity. Excellent for models of Maglite lanterns D, as well as various devices where batteries of this format are required. They are ideal for long-term work in devices with medium and low power consumption.