This is the DuraTrax NiMH 8.4V 5000mAh Onyx Hump Battery Pack with Traxxas Connector. FEATURES: Ideal sport pack for cars, trucks and boats INCLUDES: DuraTrax NiMH 8.4V 5000mAh Onyx Hump Battery with Traxxas Connector REQUIRES: NiMH compatible charger such as the Duratrax Onyx series Female Connector to Molex Male Connector Adapter, TRAC3061 (if using Onyx charger) SPECS: Capacity: 5000mAh Number of Cells in Series: 7 Rated Voltage: 8.4V Min. Discharge Voltage: 6.3V Maximum Recommended Charge Current: 5 amps Discharge Lead: 14AWG 2.7" (70mm) long wire w/Traxxas connector Pack Dimensions: 5.3 x 1.8 x 1.6" (135 x 45 x 42mm) Weight: 18.3 oz (520 g) Number of Welds per Connection: 6 spot welds Cell Size: Sub-C