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(last edited July 19, 2005) Front Page | Recent Changes | Title Index | User Preferences | Random Page | HelpSome electric railways, particularly those with long underground sections like the London Underground or the Hong Kong Mass Transit Railway, employ battery powered locomotives for use on engineer's trains at night when the main traction power supply is switched off. They are arranged to recharge from the traction power supply during the daytime when they are not required for engineer's trains. Their disadvantage is the time required out of service for recharging and the additional weight of the batteries.
