Conversion of bicycles into electric bicycles is currently carried out by many people. in the conversion process, there are still many people who do not understand the working concept and analysis of determining the right specifications for the conversion carried out. This paper presents experimental research and energy consumption analysis of a 350 Watt brushless DC electric motor with LiFePO4 Battery. LiFePO4 Battery is one of one of lithium-ion battery that Environmentally friendly, which will not destroy the ecological environment, also have no memory effects. The battery parameters that analyzed in this study are voltage, current, temperature, and internal resistance.