Basic Question about Measuring Battery Discharge/Consumed Energy

[deykey]

Hi,

I have no idea about batteries and energy measurements.
I need to calculate the expected life of a lets say 1300mAH battery (laptop) when a function that costs 750 mW is executed for 2 hours continuously.

What is the math formula?

Thank you very much and sorry if I asked something off topic or too simple!

 

[IRstuff]

V = I*R
energy = integral(V*I dt)

This is stuff you should have learned in high school or freshman physics as part of your engineering degree.

TTFN

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