Sodium-ion batteries (NIB) consisting of a Prussian White (PW) cathode, a hard carbon anode and an organic electrolyte were prepared using conventional Li-ion battery (LIB) fabrication protocol. The  Na₂MnFe(CN)₆ (Prussian White) was synthesized via a co-precipitation approach, which contains a Mn (III)/(II) redox couple and two Na ions in each unit cell. Attributed to the high Na concentration, fast ion transfer kinetics and mechanical robustness, the Prussian White cathode demonstrated a high capacity beyond 160 mAh/g, along with superior rate capability and cycling stability. The excellent performance and economical production method makes the NIB a promising alternative to lithium-ion batteries (LIB) in many application fields.