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JayPaxman
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Re: Jan 17 - Part 4. Extending Battery Lifetime
JayPaxman   1/17/2013 2:40:36 PM
NO RATINGS
So the avg current can be determined.  But to find lifetime you need to know the real battery capacity.  Data sheets won't tell you the capacity directly, because a batteries capacity (mAh) varies tremendously with the drain rate.  Even if they give a graph it's on a low resolution log-log scale and it's practically impossible to determine the capacity at YOUR load -- especially if your load varies, for example if current varies with battery voltage.  How do you know a battery's capacity?



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