The Power Bank Module is a compact charging and power-management board designed to convert a single lithium-ion battery into a portable power bank. It provides battery charging, regulated USB output, and a 4-level LED battery indicator to show the approximate remaining battery level.

Features

• Designed for single-cell Li-ion/Li-Po batteries
• Integrated battery charging circuit
• Provides regulated 5V USB output
• Built-in 4-level LED battery indicator
• Battery level indication at approximately 25%, 50%, 75%, and 100%
• Protection circuitry for safer battery operation
• Compact PCB design
• Suitable for DIY power-bank projects
• Easy battery connection through B+ and B− terminals

Specifications

Battery Level Indicator

The onboard LEDs provide a quick indication of the approximate battery level:

The actual indication thresholds may vary depending on the specific module design.

Terminal Configuration

Applications

• DIY power banks
• Portable USB power supplies
• Arduino and electronics projects
• Rechargeable battery projects
• Portable LED lights
• IoT projects
• USB-powered devices
• DIY emergency power systems

Advantages

• Charging and power-bank functionality in one module
• Convenient 4-level battery status indication
• Compact and easy to integrate
• Works with commonly available 3.7V lithium batteries
• Reduces the need for separate charging and voltage-conversion circuits
• Suitable for DIY portable-power applications

Size

• Compact PCB module
• Dimensions may vary depending on the module version

Package Includes

• 1 × Power Bank Module

Note

Use a suitable single-cell 3.7V Li-ion/Li-Po battery with the module. Connect the battery with correct polarity to B+ and B−. Do not connect batteries in series unless the module is specifically designed for a multi-cell configuration. Actual output current, protection features, and connector type may vary between module versions.