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Answers : Technology

led's and 3 aaa batteries ?

I put 3 led's on a tin can with three aaa batteries and a switch,but no resistors on the led's.i also wired the led's parallel.My question is why do the batteries get super hot even when the toggle switch is off.Im also using 26 awg wire

4 answers	Answer it!

Dec 11, 2011. 1:22 AM

rickharris says:

The only way for a battery to get hot is for it to be short circuited - You should have a resistor in series with the LED to prevent burn out. if a standard LED about 330 ohms will do.