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yup WHO NEEDs RESISTORS? thats sucha a frigging lieleds blow if you put them on 9v, and who cares if the psp battery is 3.6v? the backlight is 30...but please do go ahaead and hook an led upto an 11v battery. im sure it will do notthing...
so do we or not some one pls be dumb enough to try it with out to see what happens
YOU NEED RESISTORS.PERIODand please trry it on a range of colours red, blue green purple white, coz im sure your very very smart brother knows leds have different forward voltages that they run on