Charger 48V, 2.5A (2500mA) Standard Polarity. Charger plug is a Male Three Pin DIN connector (also referred to as an XLR connector). Pin 1 positive, pin 2 is negative and pin 3 is ground. 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.