Pink Battery Steam Engine - BigJigs Rail BNIB £8.00 Out of stock. With battery power to advance forwards, this easy to operate engine requires 1 x AAA battery (not included). Solo or with carriages attached, let this classic Battery Operated Engine take the strain. Magnetic couplings ensure compatibility with all other engines and carriages in the Bigjigs Rail range. Most other major wooden railway brands are compatible with Bigjigs Rail.