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

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-low noise 15.92dBA

🌬️Dual-speed fan control

Description

🌬️ Keep your tech cool, calm, and collected with Easycargo!

BUILT TO LAST - Robust 30,000-hour lifespan keeps your projects running longer
BEYOND RASPBERRY PI - Compatible with a wide range of robotic and development boards
PLUG PLAY VERSATILITY - One-to-two wire connector fits Raspberry Pi 3B+, 4, 5 and more
PRECISION COOLING POWER - Dual voltage modes (3.3V & 5V) for tailored airflow
WHISPER QUIET OPERATION - Experience near-silent 15.92dBA fan noise—focus uninterrupted

Easycargo is a high-performance Hypro sleeve fan designed for Raspberry Pi 3B+, 4, and 5, featuring dual-speed control via a one-to-two wire connector (3.3V and 5V), ultra-low noise operation at 15.92dBA, and an impressive 30,000-hour lifespan. Its versatile compatibility extends to various robotic projects and development boards, making it the go-to cooling solution for tech enthusiasts and professionals alike.

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 3, Raspberry pi 4 B, Raspberry pi 5
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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