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How do I calculate how long a battery will power an LED?
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December 1st, 2013
I want to power an ultra-bright LED for a science project with my son and the product description says “At about 3V, the LED draws ~200 mA, so connect two Alkaline batteries up directly with no resistor for a basic bright lamp”. From this information is there any way to determine approximately how long the batteries will last?
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