18650 Battery Case 2 Slot with On-Off Switch

The 18650 Battery Case 2 Slot with On-Off Switch is a compact, durable, and easy-to-use battery holder designed to safely house and power electronic devices using two 18650 lithium-ion rechargeable batteries. It provides a convenient plug-and-play power solution for DIY electronics, portable devices, and battery-operated circuits, making it highly useful for hobbyists, students, engineers, and makers.

This battery holder is designed to securely fit 2 × 18650 lithium-ion cells, ensuring a stable mechanical grip and reliable electrical contact. The internal metal terminals provide proper conductivity for consistent power delivery, while the strong plastic casing protects the batteries from physical damage, short circuits, and accidental disconnection.

One of the key features of this battery case is the built-in ON/OFF switch, which allows users to easily control the power supply without disconnecting the batteries. This switch helps conserve battery life by completely cutting off the output when the device is not in use, improving energy efficiency and convenience.

The case is lightweight, compact, and portable, making it ideal for integration into small electronic systems. It is constructed from high-quality insulating plastic material that ensures durability, heat resistance, and long-lasting performance even under regular use.

The 18650 Battery Case 2 Slot with On-Off Switch is compatible with all standard 18650 rechargeable lithium-ion batteries, allowing easy replacement, upgrading, or swapping of cells depending on the application requirements.

This battery holder is widely used in DIY electronics projects, Arduino projects, ESP32 systems, Raspberry Pi accessories, LED lighting systems, portable fans, small motors, robotics, IoT devices, wireless circuits, emergency backup systems, camping equipment, educational kits, and portable power applications.

Working Principle

The battery case works by connecting two 18650 lithium-ion cells either in series or parallel (depending on internal configuration) to supply electrical energy to an external device.

When the ON/OFF switch is turned ON, the circuit is completed, allowing electrical current to flow from the batteries to the connected load. When switched OFF, the circuit is broken, stopping current flow and conserving battery energy.

The metal spring and plate terminals ensure firm contact with the battery ends, maintaining stable voltage output and preventing power interruptions during operation.

Key Features

• Supports 2 × 18650 lithium-ion batteries

• Built-in ON/OFF power switch

• Secure and stable battery holding design

• High-quality insulating plastic body

• Durable and lightweight construction

• Reliable metal contact terminals

• Easy installation and replacement of batteries

• Portable and compact design

• Provides stable DC power output

• Reusable and maintenance-free design

• Prevents accidental disconnection

• Energy-saving ON/OFF control

• Compatible with standard 18650 cells

• Ideal for DIY and portable electronics

Applications

The 18650 Battery Case 2 Slot with On-Off Switch is widely used in:

• DIY electronics projects

• Arduino projects

• ESP32 development

• Raspberry Pi power supply

• LED lighting systems

• Portable fans

• Small DC motors

• Robotics projects

• IoT devices

• Wireless circuits

• Emergency backup systems

• Camping equipment

• Educational kits

• Hobby electronics

• Portable gadgets

• Battery-powered prototypes

• Sensor systems

• Small automation projects

Specifications

• Product Type: 18650 Battery Holder Case

• Battery Type Supported: 18650 Lithium-Ion Rechargeable Cells

• Number of Slots: 2

• Switch Type: Built-in ON/OFF switch

• Material: High-quality insulating plastic

• Contact Material: Metal spring and plate terminals

• Output Type: DC power output

• Application: Portable electronics and DIY projects

Package Includes

• 1 × 18650 Battery Case (2 Slot) with On-Off Switch

Safety Precautions

• Use only standard 18650 lithium-ion rechargeable batteries.

• Insert batteries with correct polarity (+ / -).

• Do not mix old and new batteries.

• Avoid short-circuiting the terminals.

• Do not expose the case to water or high heat.

• Ensure the switch is OFF when not in use for safety.

• Replace damaged or leaking batteries immediately.

• Do not attempt to modify internal wiring unless experienced.