This is the Traxxas 6-Cell 7.2V 3000mAh Power Cell NiMH Stick Pack.

FEATURES: Traxxas high current connector with 14 gauge wire
          Sub C size cells

INCLUDES: One 6-cell 7.2V 3000mAh Power Cell NiMH Stick Pack

REQUIRES: Peak-detection charger

SPECS:    Length: 155mm (6.10")
          Width: 48mm (6")
          Height: 23mm (0.91")
          Charge Rate: 3A