Features: 1) High power 8.4V 3,500mAh hump battery pack 2) Made with 7 x SC 3,500mAh high capacity and high power matched Ni-MH cells 3) Advanced Ni-MH battery technology, no battery memory effect 4) Easy operation, battery can be charged anytime without the need to fully discharge 5) Built with solid welding and standard Tamiya female connector 6) High maximum 35A discharge rate for fast vehicle start and maneuvers 7) Much longer running time and easy operation than original Ni-Cd battery pack 8) Ideal for R/C toys and airsoft guns Specifications: 1) Voltage: 8.4V 2) Max. discharge rate: 35A 3) Connector type: standard Tamiya 4) Dimensions (H x W x L): 1.5" x 1.7" x 5.4" 5) Weight: 15oz.