# Power Your Arduino Uno With Four Rechargeable AA Batteries

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## Introduction: 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

## Step 1: 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

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

Your Arduino Uno should now run!

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• ### Anything Goes Contest

Nothing, it is ok. With only 4 batteries you'll be close to the minimun and can cause Arduino to reset

Hello, I measured 4.5 Amps in a stack of 6 AA batteries (which gives it
9.5V, pretty in the average). Is this amperage ok to power up an arduino
uno? Can anyone tell me that? because I can't figure it out. Thanks!!!

Each AA battery puts out between 1.25 and 1.5 volts. If you use 4 AA batteries in series, you've got a stack producing 5-6V. The linear regular will provide 5V to the processor by burning the extra voltage as heat.

The problem here is that if you add another 2 AA batteries in series, you're just stepping up the input voltage, making the linear regulator waste more energy to provide 5 V to the processor. You'd be better off building a stack of 8 AA batteries: two 4-battery series stacks in parallel with each other.

Each AA battery puts out between 1.25 and 1.5 volts. If you use 4 AA batteries in series, you've got a stack producing 5-6V. The linear regular will provide 5V to the processor by burning the extra voltage as heat.

The problem here is that if you add another 2 AA batteries in series, you're just stepping up the input voltage, making the linear regulator waste more energy to provide 5 V to the processor. You'd be better off building a stack of 8 AA batteries: two 4-battery series stacks in parallel with each other.

Each AA battery puts out between 1.25 and 1.5 volts. If you use 4 AA batteries in series, you've got a stack producing 5-6V. The linear regular will provide 5V to the processor by burning the extra voltage as heat.

The problem here is that if you add another 2 AA batteries in series, you're just stepping up the input voltage, making the linear regulator waste more energy to provide 5 V to the processor. You'd be better off building a stack of 8 AA batteries: two 4-battery series stacks in parallel with each other.

Each AA battery puts out between 1.25 and 1.5 volts. If you use 4 AA batteries in series, you've got a stack producing 5-6V. The linear regular will provide 5V to the processor by burning the extra voltage as heat.

The problem here is that if you add another 2 AA batteries in series, you're just stepping up the input voltage, making the linear regulator waste more energy to provide 5 V to the processor. You'd be better off building a stack of 8 AA batteries: two 4-battery series stacks in parallel with each other.