These Loco's ran for about 1 1/2 to 2 miles on a charge this of course depended on the load and any gradients there may be.
The pressure in the tanks would be 700 - 900 psi reduced to 140 180 and in the larger ones 250-280 psi in the cylinders
Charging stations were at different points throughout the mine and a re-charge would take about 2 mins'
Loads could be up to 68 tons