This is a 8 cell (9.6VDC) 2200mAhr Rechargeable NiMH battery pack. The are perfect for powering microcontrollers. The batteries are NiMH so they do not have the memory issues common with NiCad battery packs. The batteries are arranged in a 1x8 array of AA batteries interconnected via soldered strips and covered with a PVC wrapping (color may be different than pictured). Two wire leads extend out of the pack.
As an option you can select to get connectors for the batteries. The connectors are sometimes referred to Anderson Powerpole connectors. They can be soldered/crimped onto the wire ends and offer a great way of disconnecting the batteries for charging, etc.
This is a 8 cell (9.6VDC) 1500mAhr Rechargeable NiMH battery pack.
These are 6" inch diameter Mecanum wheels with custom shafts, lock collars, and bearings.
This is a direct drive 4WD robot kit that uses Nexus mecanum wheels. The mecanum wheels allow it to vector in any direction.