Will it run on 3v by itself?

Yea it will. Ive hooked them up to multiple voltages. 3v they will run slow and quiet.

Are there any instructions for programming the raspberry pi to control the fans?

The fans are always on if hooked up to GPIO pins for power. You can use either 5 v or 3.3v. I use 5 v connection. I do not know of a way to turn them on/off with software.

Can these fan run on a 9v battery? Or 3, 1.5v batteries?

I use them with my Raspberry Pi boards. They have 3.3 volt and 5 volt pins. The fan runs faster with 5 than 3.3 volts but it is a little quieter when powered with 3.3 volts. They should run just fine on 4.5 volts, 3 drycells in series. I don't think I would put 9 volts on them but they are pretty cheap you could just try it and see if it gets hot or burns up.

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Easycargo Raspberry Pi Fan - 30x30x7mm, Quiet 3.3V/5V DC Brushless Cooling Fan for Pi 3 B+, 2, B+, RetroFlag NESPI Case

Easycargo Raspberry Pi Fan - 30x30x7mm, Quiet 3.3V/5V DC Brushless Cooling Fan for Pi 3 B+, 2, B+, RetroFlag NESPI Case

4.5/5

Product ID: 269130055

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Details

Product dimensions
30L x 30W x 8H
Brand
Easycargo
Power connector type
2-Pin
Voltage
3.3 Volts
Wattage
600

⏳30,000 hours lifespan

🔇Ultra-quiet operation

🔌Dual speed modes

Description

🌬️ Keep Your Cool and Code On!

STAY COOL STAY AHEAD - Optimize your Raspberry Pi's performance with this efficient cooling solution.
DUAL SPEED FLEXIBILITY - Easily switch between 3.3V and 5V DC for tailored cooling.
VERSATILE COMPATIBILITY - Perfectly fits Raspberry Pi 3 B+, Pi 3 B, Pi 2, and RetroFlag NESPI Case.
LONG LASTING RELIABILITY - Enjoy peace of mind with a fan designed to last up to 30,000 hours.
WHISPER QUIET TECHNOLOGY - Experience a serene workspace with noise levels as low as 15.92dBA.

The Easycargo Raspberry Pi Fan is a compact 30x30x7mm brushless cooling fan designed for Raspberry Pi models 3 B+, 3 B, 2, and RetroFlag NESPI Case. It features a dual-speed mode (3.3V and 5V DC), operates at a low noise level of 15.92dBA, and boasts an impressive lifespan of 30,000 hours, making it an ideal choice for both hobbyists and professionals looking to enhance their projects.

Specifications

Product Dimensions	1.18"L x 1.18"W x 0.3"H
Brand	Easycargo
Power Connector Type	5v pin
Voltage	3.3 Volts
Wattage	600 milliamp_hours
Cooling Method	Air
Compatible Devices	Raspberry pi 4 B, Raspberry pi 5, Raspberry pi 3
Noise Level	15.92 dB
Material	Copper
Maximum Rotational Speed	5000 RPM
Air Flow Capacity	1.79 Cubic Feet Per Minute
UPC	791810638377
Manufacturer	Easycargo
Item Weight	0.176 ounces
Item Dimensions LxWxH	1.18 x 1.18 x 0.3 inches
Color	Black (4-Set)
Power Source	Dc 3.3v - 5v
ASIN	B0792BW2VH
Is Discontinued By Manufacturer	No
Date First Available	January 16, 2018

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TrustScore 4.5 | 7,300+ reviews

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Easycargo Raspberry Pi Fan - 30x30x7mm, Quiet 3.3V/5V DC Brushless Cooling Fan for Pi 3 B+, 2, B+, RetroFlag NESPI Case

Details

Description

Specifications

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