This is the 8.4V NiMH 5000mAh Power Series 5 7-cell Hump Battery Pack from Traxxas. FEATURES: High voltage, high current Female Traxxas connector YOU WILL RECEIVE: One 8.4V NiMH 5000mah Power Series 5 Hump Pack REQUIREMENTS: NiMH capable charger SPECIFICATIONS: Length: 140mm (5.5") Width: 48mm (1.9") Height: 45mm (1.8") Wire Size: 12AWG Charge Rate: 3A cld 10/27/11 ir/jxs &