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mAh power consumption
Hi,
need a little help with some math, If I have an impossibly perfect battery that provides a constant voltage right up untill it dies and the battery for example is 3500mAh, how long would the battery power say a 20mA led ? Would it be, 3500 / 20 = 175 hours ? Sorry if the post seems a bit to simple... Just need to be sure about it. Thanks for your help. CSNut |
#2
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mAh power consumption
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#3
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mAh power consumption
On Sat, 30 Jun 2007 09:24:53 -0500, John Fields
wrote: On Sat, 30 Jun 2007 04:42:13 -0700, wrote: Hi, need a little help with some math, If I have an impossibly perfect battery that provides a constant voltage right up untill it dies and the battery for example is 3500mAh, how long would the battery power say a 20mA led ? Would it be, 3500 / 20 = 175 hours ? --- Yes --- Sorry if the post seems a bit to simple... Just need to be sure about it. Thanks for your help. --- You're welcome. if you have a perfect device which can supply 3500mAH and a perfect load which draws a constant 20mA, then: 3500 milliamperes * hours Time = -------------------------- 20 milliamperes The milliamperes will cancel out, and you'll be left with: 3500 * hours Time = -------------- = 150 hours 20 --- Aarghhh!!! 175 hours. -- JF |
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