How do the payloads affect the DJI M400 flight times?

The DJI Matrice 400 flight times with varying payload weights:

• 59 min with the P1 / L2 / H30T (induvidually)

• 53 min – approx. 1000 g – H30T + V1

• 50 min – approx. 1500 g – H30T + S1

• 44 min – 3000 g payload

• 31 min – 6000 g payload