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

rickharris6 years ago
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.
iceng6 years ago
The can conducts electricity, you may be heaving a short circuit you do not want..
frollard iceng6 years ago

Definitely want a proper resistor in there too.
ERIK G (author)  iceng6 years ago
thank you iceng,will look into that :-)