Lightly used, DTXC2050 Duratrax 1500 Sanyo 7.2V 1500 NiCD Battery Pack. 

 Purchased years ago, but car was ran a handful of times - just placed on a shelf. Confirmed it still takes an excellent charge (1550 mha).

1500 mha, 6cell, 7.2 Nickel cadmium battery pack w/Tamiya battery plug.  Uses 6 Sanyo Nicd cells.