Extra battery power for the Nikon D40 D-SLRBetter camera handling with long focal length lenesflexible power solution choice of lith ion or AA batteriesstyProduct Description: Product DescriptionHahnel use only the most modern battery technology to make our Lithium Ion batteries. They feature a high energy density, have no memory effect and 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. Features: Milliamp ere - 740mAh Volts – 7.4V Watt – 5.5Wh Compatibility: The Hahnel HL-2LHP Li-Ion Battery is a replacement for the Canon NB-2LH.Set Contains:1 x hähnel HL-2LHP Li-Ion Battery for Canon Digital Cameras - Replacement for Canon NB-2LH