SMOKE AND ELECTRICAL SPARKS WERE DISCOVERED EMERGING OUT OF THE LOCOMOTIVE BATTERY CHARGING UNIT ON THE STATION. A MINER SHUT THE POWER OFF AT THE CONTROL BOX AND ATTEMPTED TO EXTINGUISH THE F IRE WITH A 20# FIRE EXTINGUISHER. TWO OTHER EES NOTICED THE SMOKE AND ATTEMPTED TO EXTINGUISH THE FIRE W/ ANOTHER 20# FIRE EXTINGUISHER. THEY WERE UNSUCCESSFUL AND EVERYONE GOT ONTO THE CAGE