I am using a Nokia mobile charger that can output DC 5V at 350mA. I am connecting a 63 LED panel (salvaged from an old emergency light) to the charger directly, and the LEDs glow. I removed all the circuits from this emergency light, and only kept the LEDs panel, connected directly to the charger.
From what I know, an LED needs about 20mA of current, so 63 LEDs in my setup will need 1260mA of current. The charger I am using only outputs 350mA. How are the LEDs still glowing fine? What is happening here?
Basically I want to know what will happen in these cases:
1) If the item draws more CURRENT than what the power source can provide, what will happen?
2) If the source can provide more CURRENT (say if I switch to a 2A charger) than what the LEDs can consume, what will happen?
PS: I just play with these things, so my knowledge in this area is very limited.