This is a 6 cell (7.2VDC) 2200mAhr Rechargeable NiMH battery pack.
The batteries are NiMH so they do not have the memory issues common with NiCad battery packs. The batteries are arranged in a 1x6 array of AA batteries interconnected via soldered strips and covered with a PVC wrapping. Two wire leads extend out of the pack.
As an options below you can select to get 15A connectors for the batteries. The connectors are sometimes referred to as Anderson Powerpole connectors. They can be soldered/crimped onto the wire ends and offer a great way of disconnecting the batteries for charging, etc.
SparkFun's minimal design approach to Arduino. This is a 5V Arduino running the 16MHz bootloader.
This is an Enclosed 4-wheel drive remote control robot kit. It uses four powerful wheelchair motors and the inside robot cavity has plenty of room for electronics.