Here i am posting a tutorial that explain how to make a simple LED TORCH.Its a very simple and very useful torch.We can easily change the battery after battery charge is empty.
instructables
Circuit diagram
Components
First make two holes in the 9v battery socket to place the led,then
connect the led positive terminal to one terminal of the push button
switch the opposite terminal of the switch connected to the 330 ohm
resistor.next side of resistor connected to the terminal wire coming
from the positive terminal of the battery.The negative terminal of the
LED is directly connected to the negative wire of the battery holder.You
can go through my video for more details