18650 3-Slots Battery Holder 3.7V
The 18650 Battery Holder (3-Slots) is a safe and efficient solution for powering electronic projects with lithium-ion batteries. It fits three standard 18650 rechargeable cells rated at 3.7V each. The frame is made of strong ABS plastic. It keeps the cells secure and shields them from physical damage.
Each slot uses spring-loaded nickel-plated steel contacts. These ensure firm grip, strong conductivity, and long service life. The holder includes pre-soldered wires: red for positive (+) and black for negative (–). This makes it easy to connect without extra soldering.
By default, the three batteries connect in series. This gives an output of around 11.1V nominal (3.7V × 3) and up to 12.6V when fully charged. For applications requiring longer runtime at 3.7V, you can rewire for parallel configuration. This flexibility makes the holder suitable for different projects.
It integrates well with Arduino, Raspberry Pi, ESP32, and other microcontrollers. Makers use it in robotics, IoT devices, solar-powered systems, and portable gadgets. The stable voltage from three cells in series is ideal for DC motors, LED strips, or small embedded systems.
Key Features
Holds 3 × 18650 lithium-ion cells (3.7V each)
Durable ABS plastic body
Nickel-plated spring contacts for secure grip
Pre-soldered leads: red (+), black (–)
Supports series (11.1V / 12.6V) or parallel (3.7V high capacity) connections
Compact and lightweight design
Easy integration with Arduino, ESP32, Raspberry Pi
Product Specifications
| Specification | Details |
|---|---|
| Battery Type | 18650 Lithium-ion |
| Slot Capacity | 3 Cells |
| Nominal Voltage | 11.1V (series) |
| Max Voltage | 12.6V (fully charged) |
| Material | ABS Plastic ‘ |
| Contacts | Nickel-plated Steel |
| Output Wires | Red = Positive, Black = Negative |
| Current Range | Up to 5A (depends on cells) |
| Size | Compact, enclosure-friendly |
| Configurations | Series or Parallel |
Wire Configuration
| Wire Color | Polarity | Use |
|---|---|---|
| Red | Positive | Battery + |
| Black | Negative | Battery – |
Applications
Robotics and automation systems
IoT devices and wireless sensors
Arduino and ESP32 projects
Raspberry Pi portable setups
LED lighting and strips
DIY solar-powered kits
Prototyping and lab circuits
