How Many Leds Can A Aa Battery Power. Ive been using the word typical as every LED has to be used according to its spec which varies vastly. An AA battery has a nominal voltage of 15V which varies from 11 to 15 depending upon how much the battery has been discharged.
The typical cheap way to light an LED is to use a battery of 2 cells in series. Two AA cells will give you enough voltage for red green yellow and orange LEDs. 16V x 5 8V which is less than 9V.
If the forward voltage of say a Red LED is 16V and power supply available is 9V then you can connect 5 LEDs.
A red LED will drop about 22V so like you saw it can be powered from a 3V battery. The typical cheap way to light an LED is to use a battery of 2 cells in series. Most LEDs require 25 35V minimum to turn on. What is more important brightness or operating time.
