 Around 1910, two of these motor cars, numbered 201 and 202, were fitted with batteries, and worked on a number of lines in addition to the Central London Railway.In 1915 they were loaned to the Bakerloo line, when it was being extended to Queens Park.Car 202 had its 'Nife' battery updated to one with 263 cells made by Edison Accumulator Ltd in 1924, while the number of cells in car 201 was increased from 200 to 238 in 1932.