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how long does a 50ah battery empty if a 400 watts computer is loaded on it provided it was full?
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  1. Quote:
    how long does a 50ah battery empty if a 400 watts computer is loaded on it provided it was full?


    I am not a learned one, but a 400W computer, without any inefficiencies would be a 400W/12V = 33 A drain on your battery.
    50AH at 33A drain would only take 1.5 hours to completely drain the battery.
  2. Sounds like a homework question.
  3. Also my math was assuming your computer was pulling a steady 400W. This most likely isnt the case. So it's a variable.

    1.5 hr minimum probably up to 2-2.5 hrs.
  4. And if the battery has a relatively high internal resistance, it may be less than 1.5 hours.
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