Battery Led
Battery Led
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Syma S107/S107G R/C Helicopter *Colors Vary List Price: Sale Price: $15.59 You save: $114.36 (88%)  |
DescriptionThis Brand New 3 Channel Gyro mini Metal rc helicopter is 1 of the world's newest, smallest and lightest RC Helicopter you can get! At approx. 7.5" long, it easily fits in the palm of your hand and is fully functional, equipped with latest Gyroscope technology, which makes this helicopter an instant hot seller in the RC World... |
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Why did my 9V battery die when hooked up to a simple LED light?
I had a 9V battery hooked up to a tiny yellow LED light and it went dead after two days of being on. There was a 250Ohm resister hooked up after the negative end of the battery (as per the instructions of the guy at Radio Shack.)
I really thought that setup would remain on for months on end with no problem. I thought a LED light takes up barely any electricity.
You could measure the volotage drop across the resistor. Then, using ohm's law, you could calculate the current being the LED is drawing. Might be significant.
Was it a fresh battery?