Instructables

Power your Arduino Uno with four rechargeable AA batteries

Picture of Power your Arduino Uno with four rechargeable AA batteries
This Instructable will show how to power your Arduino Uno with four rechargeable AA batteries. You will need:

An Arduino Uno

4 AA battery holder (I HIGHLY recommend this one from RadioShack, as it not only has an internal switch for turning on the Arduino, it also has the necessary wires needed to plug into the Arduino Uno)

4 rechargeable AA batteries, at 1.25V each. (The reason why we should be using rechargeable batteries is because they are efficient and give the Arduino Uno the perfect amount of volts at 5V)

Stanley #1 Screwdriver or something similar 



 
Remove these adsRemove these ads by Signing Up

Step 1: Step 1: Insert the batteries

Picture of Step 1: Insert the batteries
Find the screw on one of the sides of the case, and remove it with the screwdriver, then slide the lid so that the battery holder is uncovered. Place your charged rechargeable batteries in the respective orientation. Finally, slide on and screw on the lid again. 

Step 2: Step 2: Plug the cables in

Picture of Step 2: Plug the cables in
IMG_4693.JPG
Plug the positive, red cable into VIN, and the negative, black cable into one of the GND ports. Then, turn the switch on the battery case to ON. 

Step 3: Step 3: Run your Arduino Uno

Picture of Step 3: Run your Arduino Uno
Your Arduino Uno should now run!
ishan5536 months ago

what will happen if i use 6 aa battries

If you use 1.5V Alkaline or similar, you will be powering it with 9V (perfect). If you use 1.2V NiMh batteries, you will get 7.2V, the MINIMUM voltage the regulator will put 5V out with.

JesusGeek1 year ago
Your Arduino itself is actually not taking 5V. You put 5V in but the on-board regulator is spitting out lower voltage because any input below 6V will come out other than 5V. To see how much power actually comes out of your Arduino, test the voltage on an I/O pin when it is set to high.