The entire circuit is drawing 1.2 Amps at 5 Volts. ( 6 Wh )

So I calculated that the circuit consumes 6 Watts of power in 1 hour.

I found a battery that is a 2S Lipo Battery 7.4V 6.5Ah. ( 48.1 Wh)

I have found that this 2S Lipo battery can provide me with 8.01 hours of uninterrupted power ( 48.1 / 6 = 8.01).

Can you tell me if the mathematics is correct?

Thank you