18650 2-Slots Battery Holder 3.7V
The 18650 Battery Holder (2-Slots) gives a safe and reliable way to connect two 18650 lithium-ion batteries. It fits any standard 3.7V rechargeable cells. The holder uses a strong ABS plastic frame. It protects the batteries and keeps them locked in place.
Each slot has spring-loaded contacts. These contacts use nickel-plated steel for high conductivity. They hold the batteries tightly and resist wear and corrosion. The holder comes with pre-soldered wires: red for positive (+) and black for negative (–). This makes wiring quick and easy. You don’t need to solder extra clips.
This holder supports both series and parallel connections. By default, the two slots connect in series, giving about 7.4V output (3.7V × 2). You can rewire it for parallel use if you need extended capacity while keeping the voltage at 3.7V. This makes the holder flexible for many projects.
It works with Arduino, ESP32, Raspberry Pi, and similar boards. Makers use it in IoT projects, robotics, solar-powered kits, and portable electronics. It can power LED strips, small motors, and sensors. The compact design allows it to fit inside enclosures or custom cases.
Using rechargeable 18650 cells with this holder reduces waste and cuts costs. Instead of replacing disposable batteries, you recharge and reuse the cells many times. This makes it both eco-friendly and reliable for long-term projects.
Whether you build a smart device, test circuit, or DIY gadget, this 2-slot holder provides a clean and durable way to supply lithium power. Its stable contacts, safe housing, and flexible use make it a key accessory for electronics projects.
Key Features
Holds two 18650 lithium-ion cells (3.7V each)
ABS plastic frame for safety and durability
Nickel-plated spring contacts for strong grip
Pre-soldered wires (red = +, black = –)
Supports series (7.4V) or parallel (3.7V high capacity) connections
Compact and easy to mount in enclosures
Works with Arduino, Raspberry Pi, and ESP32
Product Specifications
| Specification | Details |
|---|---|
| Battery Type | 18650 Lithium-ion |
| Slot Capacity | 2 Cells |
| Nominal Voltage | 3.7V × 2 = 7.4V (series) |
| Max Voltage | 8.4V (series fully charged) |
| Material | ABS Plastic |
| Contacts | Nickel-plated Steel ‘ |
| Output Wires | Red = Positive, Black = Negative |
| Current Range | Up to 5A (depends on batteries) |
| Size | Compact, breadboard-friendly |
| Configurations | Series or Parallel |
Wire Configuration
| Wire Color | Polarity | Use |
|---|---|---|
| Red | Positive | Battery + |
| Black | Negative | Battery – |
Applications
IoT and smart devices
Robotics and automation kits
Arduino and ESP32 projects
Raspberry Pi portable systems
LED lighting systems
DIY power banks and solar kits
Prototyping and lab projects
