For healthy environment and sustainable economic growth we need clean and efficient electric power generation systems. The natural sources of renewable energy available to human are: the solar, tidal, wind, bio-gas and biomass etc. This paper introduces a new renewable source of energy; energy from cow urine that can produce electricity by electrolytic conductions. The alkaline nature of fresh cow urine acts as a good electrolyte liquid. The system works like a conventional battery system. However, a discharged battery needs to recharge by electricity in order to reactivate it. On the other hand, cow urine based system needs only to replace old urine by fresh urine to activate the system again. As no electricity is required for charging the system, the daily available fresh urine from a dairy farm could be a possible source of renewable energy. In order to understand the feasibility of the source, we built a car battery size prototype that can hold approximate five liter of fresh urine as electrolyte. We used similar and equal number of electrode that a typical car battery does. We measured the performance of the source with loads and observed its outputs. The details of the system and its performances have been described in this paper.