This is the DuraTrax NiMH 8.4V 5000mAh Flat Battery Pack with Traxxas Connector. FEATURES: Flat (side by side) cell configuration with Traxxas connector Specifically designed for the Traxxas Summit, E-Revo and E-Revo Mamba because Traxxas recommends using 7-cell packs in these vehicles for the best performance. INCLUDES: DuraTrax NiMH 8.4V 5000mAh Flat Battery Pack with Traxxas Connector REQUIRES: Charger capable of charging NiMH batteries, such as the DuraTrax Onyx series or the Great Planes TRITON series SPECS: Capacity: 5000mAh Number of Cells in Series: 7 Rated Voltage: 8.4V Minimum Discharge Voltage: 6.3V Maximum Recommended Charge Current: 4 amps Discharge Lead: 12AWG 3.1" (80mm) long wire with Traxxas Connector Pack Dimensions: 6.4 x 1.9 x 1.0" (163 x 48 x 25mm) Weight: 19.1oz (542g) Cell Connection: Soldered silver battery bars Cell Size: Sub-C