Sanyo CP1700 SC cell battery pack customized for the Systema PTW Crane Stock.  This high performance battery has a peak discharge rate of 30 Amps ensuring peak performance for every shot!  This dual stick battery is designed for Crane Stock type applications in the PTW, but can also be used in other rifles.  If both sticks are alinged next to each other, the pack is the same size as an 8.4V large type battery, making this a good option for airsoft rifles with smaller full stocks or for guns with more limited storage capacity for batteries!