Logistics services startup COGOS Technologies on Wednesday said it will augment its fleet with 2,500 electric vehicles across Bengaluru, Hyderabad, Delhi and Gujarat, and later in Maharashtra and Tamil Nadu in a phased manner over the next two years. Currently, the company operates with three-wheeler commercial vehicles that have a payload capacity of 500 kg. It is working with original equipment manufactures (OEMs) for four-wheeler EVs with a capacity of 1 tonne, which will be be used for the e-commerce, grocery, distribution and mobility sector.