Cleco T50-1000497 CellCore / CellTek 18V Battery. Cleco CellCore Cordless Assembly Tools are the most versatile, easy-to-use cordless assembly tools in the industry. Users can program up to 10 rundown strategies, called ”FastApps”, directly on the tool in standalone mode. Users can also pair CellCore Nutrunners with Cleco’s new mPro200 controller. By pairing the devices, users can easily capture data in real time and program advanced rundowns within a much more compact footprint.