Will give lifesaver to a good explanation that gets the correct answer! (I don\'

Question

Will give lifesaver to a good explanation that gets the correct answer! (I don't know what the answer is yet though, it is online homework xD ). I really want to know the METHOD not just the correct answer alone.

Given this image of a cell phone battery's charge cycle:

Thanks in advance!

Explanation / Answer

the total charge is found by finding the integral of i.dt or just by finding the area under the current time graph. => Q = 1260 C ( convert the time to seconds) now the energy transferred is given by E = area under the voltage -time graph multiplied by the current during that time. => E = 50*10^-3*(5*60*60*.5*0.75 + 5*60*60*1) + 20*10^-3*5*60*60*[1.25 + 0.25/2 ] => E = 1732.5 J

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