The 2S 18650 Lithium Battery Holder (2-Slot) is a robust, series-wired enclosure designed to hold two 3.7V Li-ion cells. At Electrapac, we recommend this holder for projects that require a higher operating voltage, such as motor-driven robots or high-power LED arrays.

Product Overview

This dual-slot battery case is pre-configured in Series, meaning the voltages of the two 18650 cells are added together to provide a nominal output of 7.4V (up to 8.4V when fully charged). Made from high-grade ABS plastic, it features heavy-duty spring contacts to ensure a stable electrical connection even under vibration.

Key Features for Electrapac Customers

• Higher Voltage Output: Perfect for devices that won't run on 3.7V, such as L298N motor drivers or 9V-compatible microcontrollers.

• Tough Construction: The rigid plastic frame protects the battery cells from physical damage and short circuits within your enclosure.

• Plug-and-Play Wiring: Comes with pre-tinned leads, allowing for quick soldering or connection to screw terminals.

• Secure Fit: High-tension nickel-plated springs hold the batteries firmly in place, preventing power loss during movement.

• Internal Polarity Guides: Clearly molded "+" and "-" symbols inside each slot to prevent incorrect battery insertion.

Wiring & Safety Tips

When using the Electrapac 2-slot holder, keep these safety points in mind:

1. Use Matching Cells: Always use two 18650 batteries of the same brand, capacity (mAh), and charge level to ensure balanced discharging.

2. Protection is Key: Because this is a 7.4V source, we strongly recommend using a 2S BMS (Battery Management System) to protect against over-charging and over-discharging.

3. Heat Management: If your project draws high current (over 3A), ensure the holder has adequate airflow to prevent the plastic from softening.

Primary Applications

• Robotics: Powering Arduino-based robots, RC cars, and drones that require 7V–9V for motor torque.

• Portable Audio: Providing the split-rail or higher voltage needed for small Class-D audio amplifiers.

• Wireless Transmitters: Powering long-range RF modules that need more than 5V for maximum signal strength.

• DIY Power Walls: Acting as a modular building block for larger 7.4V battery banks.

• Smart Home Devices: Reliable power for motorized blinds, locks, or outdoor security sensors.

Why Shop at Electrapac?

We source our 2-Slot 18650 Holders with reinforced wire exit points to prevent the leads from snapping under stress. At www.electrapac.com, we provide the reliable power housing needed to take your high-voltage DIY designs from the breadboard to the real world.