Adaptor 5v 2A

An 18650 battery holder for three cells is a convenient accessory for securely holding three 18650 lithium-ion batteries, commonly used in various electronic projects and devices.
Here are some key features:

Compatibility: Designed specifically for 18650 lithium-ion cells, which typically have a nominal voltage of 3.7V each.

Material: Often made from durable materials like ABS plastic and metal, ensuring both safety and longevity.

Polarity Identification: Clearly marked with positive (+) and negative (-) terminals to ensure proper orientation and connection.

Spring Retention: Equipped with a spring mechanism to securely hold the batteries in place, preventing movement and ensuring a stable connection.

Dimensions: Typically around 81 mm x 41 mm (approximately 3.19 inches x 1.61 inches), making it compact and easy to integrate into various projects.

Mounting Options: Some holders come with mounting holes or clips for easy installation on PCBs or other surfaces.

Series or Parallel Connection: Can be used to connect the three cells in series or parallel, providing a combined voltage of 11.1V (series) or 3.7V (parallel) depending on your project requirements.

Applications
DIY Projects: Ideal for custom electronics projects, such as building battery packs, portable chargers, and DIY gadgets.

Robotics: Used in robotics to power motors, sensors, and other components.

Portable Devices: Suitable for powering portable devices like flashlights, radios, and other handheld electronics.

Educational Kits: Great for educational kits and projects, helping students learn about battery technology and electronics.

Small Production Runs: Suitable for small-scale production of custom electronics, allowing for rapid iteration and testing.