The Hahnel HL-EL20 is equivalent to the Nikon EN-EL20 battery and is the battery for the Blackmagic Pocket Cinema Camera as well as a number of Nikon cameras. Only the most modern battery technology is used in Hähnel Lithium Ion batteries. They are environmentally friendly, feature a very high energy density and have no memory effect. These batteries are much smaller and lighter than any other rechargeable battery with similar capacity. All batteries are produced to the highest quality standards. A built-in microprocessor safeguards the cells by limiting maximum voltage and by protecting against deep discharge, short circuit and overload.