Lithium Ion 2-Cell Battery Holder Shield

Overview

The Lithium Ion 2-Cell Battery Holder Shield is a compact power management module designed to securely hold and power electronics using two 18650 Lithium-Ion cells in series. Engineered for safety and convenience, the shield combines secure battery mounting, an onboard charging circuit, and multi-layer protection to deliver reliable 7.4V nominal power for portable projects, robotics, IoT devices, and other rechargeable systems.

Key Benefits

• Safe, rechargeable power for mobile electronics and prototyping
• Eliminates need for separate external charger when using the onboard charging input
• Integrated protection extends battery life and reduces risk of damage
• Compact footprint simplifies integration into custom enclosures and projects

Charging and Protection

The shield features an onboard charging circuit that supports charging via micro-USB or Type-C input depending on the model. Charging is managed to ensure cells reach full charge safely. Built-in protection circuits include overcharge protection, over-discharge protection, and short-circuit protection to help prevent damage to the cells and connected electronics.

Output and Integration

Two 3.7V 18650 cells are connected in series (2S) to provide a combined nominal voltage of 7.4V and a fully charged voltage of up to 8.4V. Standard output terminals or header pins make it simple to connect the shield to motor drivers, microcontrollers, wireless modules, and other electronics. Status LEDs show charging and power states for quick visual feedback.

Features

• Holds 2 x 18650 Lithium-Ion cells in series (cells not included)
• 7.4V nominal output, up to 8.4V when fully charged
• Onboard charging circuit with micro-USB or Type-C input (model dependent)
• Overcharge, over-discharge, and short-circuit protection
• Status LEDs for charging and power indication
• Secure spring-loaded battery contacts for reliable connection
• Compact form factor for easy integration into DIY and portable systems

Applications

• DIY robotics and automation projects
• Portable embedded systems and battery-powered prototypes
• Wireless sensor nodes and IoT devices
• Arduino and Raspberry Pi battery power solutions
• Motor drivers, LED modules, and remote control systems
• Wearable tech and portable instrumentation

Technical Specifications

• Battery type: 2 x 18650 Lithium-Ion cells (3.7V nominal each, not included)
• Configuration: Series (2S)
• Nominal output voltage: 7.4V
• Maximum charged voltage: 8.4V
• Charging input: micro-USB or Type-C depending on model
• Protection: Overcharge, over-discharge, short-circuit protection
• Indicators: Charging and power status LEDs

Safety and Usage Notes

• Use only matched 18650 cells of the same capacity and age for best results.
• Do not leave charging batteries unattended for extended periods.
• Ensure correct polarity when inserting cells to avoid damage.
• Replace damaged or swollen cells immediately and recycle properly.

What is Included

• 1 x Lithium Ion 2-Cell Battery Holder Shield (batteries not included)
• Built-in charging and protection circuitry

Note: Images are for illustration purposes. Actual product appearance, connector type, and layout may vary slightly depending on stock or version.