The Lithium Ion 18650 1-Cell Battery Holder Shield V3 is a compact battery holder and charging/power management module designed for a single 3.7V 18650 rechargeable lithium-ion battery cell. It provides a convenient way to securely mount an 18650 battery while allowing the cell to be charged through its built-in Micro-USB charging port.
The V3 shield is suitable for DIY electronics, Arduino projects, ESP32 projects, portable power systems, robotics, IoT devices, and battery-powered prototypes. Its compact PCB design makes it easy to integrate into custom projects where a rechargeable 18650 battery is required.
This version features a simple Micro-USB connector for charging and does not include charging indicator LEDs, making it different from versions that use USB Type-C connectors or provide dedicated charging-status indicators.
Key Features
- Designed for 1 × 18650 Lithium-Ion Battery
- Single-Cell (1S) Battery Configuration
- Nominal Battery Voltage: 3.7V
- Built-In Battery Charging Circuit
- Micro-USB Charging Port
- Compact V3 PCB Design
- Secure 18650 Battery Holder
- Convenient Rechargeable Battery Solution
- Suitable for DIY and Portable Electronics
- Easy to Integrate into Arduino and IoT Projects
- No Charging Indicator LEDs
Technical Specifications
- Product Type: 18650 Battery Holder / Charging Shield
- Model: V3
- Battery Type: 18650 Li-Ion Rechargeable Cell
- Battery Quantity: 1 Cell
- Battery Configuration: 1S
- Nominal Battery Voltage: 3.7V
- Fully Charged Battery Voltage: 4.2V
- Charging Input: 5V DC
- Charging Connector: Micro-USB
- USB Type-C: No
- Charging Indicator LED: Not Included
- Battery Holder: Spring-Contact 18650 Holder
- Mounting Type: PCB Module
- Battery: Not Included
Working Principle
The shield holds a single 18650 lithium-ion battery and provides a convenient charging interface through the Micro-USB port.
When a suitable 5V USB power source is connected to the Micro-USB input, the onboard charging circuit regulates the charging process and charges the connected 18650 cell to its appropriate full-charge voltage.
When the USB power source is disconnected, the stored energy in the 18650 battery can be used to power a connected electronic circuit through the shield’s output connections.
The module is therefore useful for creating rechargeable portable projects without requiring a separate battery holder and charging circuit.
Applications
- Arduino Portable Projects
- ESP32 Projects
- IoT Devices
- Raspberry Pi Pico Projects
- DIY Power Banks
- Portable Electronics
- Robotics Projects
- Battery-Powered Sensors
- LED Lighting Projects
- Rechargeable Electronics Projects
- Embedded Systems
- Educational Electronics Projects
Advantages
- Supports a standard 18650 rechargeable battery
- Integrated charging circuit
- Convenient Micro-USB charging connection
- Compact and lightweight PCB design
- Easy battery installation and replacement
- Useful for portable and rechargeable projects
- Reduces the need for separate battery holder and charger
- Suitable for hobbyists, students, and electronics developers
Usage Tips
- Use only a compatible 3.7V nominal 18650 Li-Ion battery.
- Make sure the battery is inserted with the correct polarity.
- Use a suitable 5V Micro-USB power source for charging.
- Do not use damaged, swollen, leaking, or physically compromised batteries.
- Do not install incompatible battery chemistries.
- Avoid short-circuiting the battery terminals.
- Since this version has no charging indicator LEDs, charging status cannot be monitored through an onboard LED.
- For projects requiring additional battery protection, verify that the battery or module provides the required protection features before use.
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