India, March 16 -- Over the past few years, Old Delhi's cramped streets have begun to feel even more congested. Much of this is due to the arrival of the so-called battery rickshaw, which has almost entirely replaced the old-fashioned manually driven rickshaw. Battery rickshaws are broader and take up more space in the already narrow lanes. For the rickshaw man, of course, they have arrived as a life-changing relief. Unlike the traditional rickshaw puller, he does not have to squeeze out the last ounce of energy from his exhausted body to drag passengers through crowded streets-sometimes clambering down to haul the vehicle by hand on steep slopes. A good part of the labour now being done by the rickshaw's motor, equipped with a rechargeable...