Wiring LEDs to a 9V Battery?

How Would I wire some LEDs (a strip maybe?) to a 9v battery and be able to turn it on and off? I’m not sure what kind of LEDs yet, I want to do it for the interior of my car (without running through fuses or car battery), so I would make an encasing for the battery and all, to make it look more neat. but… Depending on how many LED’s and how often I turn them on, would the battery last a decent amount of time?
Answer #1
Google…..Run leds from a 9V battery…is your best bet.
http://www.google.com.au/search?q=run+leds+from+9v+battery&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-GB:official&client=firefox-a
Answer #2
make sure you run a current limiting resistor in series with the battery so the led’s don’t burn out…will also make you battery last longer.
a 100k resistor should probably do.
good luck and have fun.
Answer #3
It’s a 9V battery so burning out is not likely to be a problem like it would if connected to the car battery. Just get LED’s right for the voltage.
LED’s can only be connected one way so it will work or it won’t and they will not be damaged.
LED’s are fairly low powered, just look at all the LED torches available now, so it should last fairly well.
Just wire a switch in series with the LED’s and battery so it can be turned off. Something like a small slide switch should be okay.
Answer #4
If the LEDs are 12v .. a strip of 12v LEDS, can I still use a 9v battery?