Lithium ion battery with a particularly long service life, allows you to use your camera for a long period of time - Brand name cells for a longer service life and stable life cycles - Safety electronics to protect the cells - Polyswitch stops current flow in case of damage or overheating - Quality assurance by continuous control of the safety electronics and a reliable capacity indication - Gold-plated contacts prevent oxidation and ensure optimum current flow - 5-year guarantee - Equivalent to Nikon EN-EL21