A question about power, and photons

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The discussion revolves around calculating the battery life of a handheld gaming device with a specific pixel density and power consumption. The device has a 5V, 7 watt-hour battery and a screen measuring 2x3 inches with 120 pixels per inch. It is questioned whether the device can last a week with daily use of 60 minutes in a physics class, considering each pixel is lit by a photon emitted from an electron. Participants are encouraged to share their attempts at solving the problem to receive guidance. The focus remains on understanding the relationship between power consumption, battery capacity, and usage duration.
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Homework Statement


a handheld gaming device has 120 pixels per inch on its 2X3 in screen and uses a 5V, 7 watt*hour battery to power it. if each pixel is lit by a photon that is emitted from one electron flowing across the diode, will it last the whole week if you play it just in physics? (physics is 60 minutes each day for five days a week and assume a photon lasts 1 nanosecond)


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The Attempt at a Solution

 
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