Adaptor 5v 2A

An 18650 2-cell battery holder with a cover and switch is a convenient accessory for securely holding two 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.

Cover: Features a removable sliding cover that is secured with a small head screw, providing protection to the battery cells from environmental effects.

Switch: Comes with an ON/OFF switch, allowing easy control of power to your project.

Dimensions: Typically around 93 mm x 43 mm x 23 mm (approximately 3.66 inches x 1.69 inches x 0.91 inches).

Series Connection: The two 18650 cells are connected in series inside the case, providing a combined output voltage of 7.4V.

Cable Length: Leads are about 15 cm long, with the last 5 mm tinned for easy soldering and connection.

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.