LED on Mobile Battery

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About: "May the good belong to all the people in the world. May the rulers go by the path of justice. May the best of men and their source always prove to be a blessing. May all the world rejoice in happiness. ...

Simplest LED light from a mobile battery, using just a 1 kilo-ohm resistor!

Step 1: Parts & Assembling:

Parts:

1. One LED

2. One resistor - one kilo-ohm resistor

3. One mobile battery

Assembly:

Connect the 1K resistor to the positive of the LED. (Or to negative; resistor to any side)

Connect this positive of LED to (outside) positive of the mobile battery.

Just bend and manually connect the LED leg to the mobile slots.

NEVER solder directly to a battery.

Step 2: How Long ?

if you have a 1000 mAh battery and a normal white led of 20 mA, it should last 1000 / 20 = 50 hrs.

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