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The 18650 x 2 Battery Holder Box with Cover and On/Off Switch offers a complete, fully enclosed power solution for $18650$ lithium-ion battery cells. Manufactured from high-impact ABS plastic, this dual-slot battery case keeps your rechargeable cells firmly in place while shielding them from environment hazards and mechanical vibrations.

The internal nickel-plated steel spring contacts connect the two $18650$ battery slots in series wiring, generating a combined output voltage of $7.4\text{V DC}$ nominal ($8.4\text{V}$ peak when fully charged). The integrated slide-on protective lid completely encloses the batteries and can be secured with a small screw (optional) to prevent accidental fallout during mobile use. With its built-in SPST sliding On/Off toggle switch on the side, you can instantly cut power to your main circuit without repeatedly unplugging wires or removing batteries.

Key Features and Benefits

• Series Wired Output ($7.4\text{V}$ Nominal): Combines two $3.7\text{V}$ cells to deliver $7.4\text{V}-8.4\text{V}$ output, perfect for driving DC motors, $7805$ voltage regulators, or motor driver shields.

• Integrated SPST On/Off Switch: Convenient slide switch isolates battery power instantly, preserving cell charge and adding safety during circuit assembly.

• Removable Slide-Lock Cover: Fully encloses battery terminals to eliminate short circuit risks from external metallic objects inside project boxes or backpacks.

• Corrosion-Resistant Steel Contacts: High-tension nickel-plated spring contacts ensure firm electrical conductivity even during high vibration.

• Pre-Stripped Color-Coded Wires: Features $15\text{cm}$ red ($+$) and black ($-$) 26AWG lead wires for easy soldering onto PCB boards or connecting directly to terminal blocks.

Technical Specifications

Polarity & Safety Warning Guide

• Red Wire ($V+$): Positive output connected to the On/Off switch circuit.

• Black Wire ($GND$): Negative output connected directly to ground contact.

CRITICAL LI-ION SAFETY WARNING:

1. Ensure both $18650$ batteries are inserted with correct polarity as marked inside the battery compartment slots. Incorrect insertion can cause reverse polarity, leading to battery overheating, chemical leakage, or fire.

2. Always use two $18650$ cells of the same brand, age, capacity (mAh), and charge state to prevent cell imbalance and over-discharge.

3. This holder does NOT contain an internal Battery Management System (BMS) or charging circuit. Always charge batteries externally using a dedicated $18650$ balancing charger or add a $2\text{S}$ BMS module to your circuit.

Applications

• Robotics & DIY Smart Cars: Portable power source for Arduino 2WD/4WD chassis, L298N motor drivers, and servo motors.

• IoT & Outdoor Sensor Nodes: Enclosed power supply for ESP32, ESP8266, or LoRa remote monitoring stations.

• Custom LED Lighting & Flashlights: Driving high-power LED strips, COB chips, or custom handheld torches.

• Portable Audio Amplifiers: Clean DC power source for PAM8403 or TPA3116 mini Bluetooth amplifier boards.

Package Includes

• 1 x 18650 x 2 Battery Holder Enclosure Box with Cover and On/Off Switch

Shipping & Delivery

• Free shipping on orders above ₹999 across India

• Dispatched within 1-3 business days

• Expected delivery: 3-7 business days depending on location

• Secure packaging to ensure safe transit of electronic components