I just met the person who wrote the article at our TCA Western Div meet today. The battery will last about 2 hours, and takes about 3 to charge. You can run more than 2 engines at a time on the same track. He converted a Williams GP and switcher. He gave our club a demo running it from an Ipad and Iphone. The board was designed for HO, but he is developing a higher amp board for larger O scale engines/equipment.
Bob