Charger - 48V, 3.5A (3500mA) Standard Polarity. The charger plug is a three port inline female DIN connector, sometimes referred to as a "Razor" plug. Pin 1 positive, pin 2 is ground and pin 3 is negative. Be sure to use this charger only in the designated applications with corresponding power ratings and polarities. We do not warrant this product against misuse, all chargers are tested before leaving our facility. Voltage: 48V Amperage: 3.5A (3500mA) Polarity: Standard Connector: 3 Pin Din - Female