Direct current power adapter for powering network equipment

A direct current (DC) power adapter for a networking equipment, the DC power adapter comprising:

• a DC power input port configured to electrically couple to a DC power source and receive a primary DC power input from the DC power source;
• a primary DC power output port configured to electrically couple to the networking equipment and supply a first DC power output to the networking equipment;
• one or more battery connection ports configured to electrically couple to a battery backup unit (BBU) and supply a second DC power output to the BBU when the DC power input port is active and receive a secondary DC power input from the BBU when the DC power input port is inactive;
• and
• one or more operating circuits electrically connected between the DC power input port, the primary DC power output port, and the one or more battery connection ports, the one or more operating circuits configured to:
• determine whether the DC power input port is active or inactive;
• transform the secondary DC power input into the first DC power output when the DC power input port is inactive;
• and
• transform the primary DC power input into the first DC power output and the second DC power output when the DC power input port is active, wherein respective voltages and currents of the first and second DC power outputs are based on a voltage and current of the primary DC power input.