DIY Power Bank Module with Dual USB Output- 3.7V to 5V 2A with 18650 LiPo Charger

DIY Power Bank Module with Dual USB Output (3.7V to 5V 2A) for 18650 LiPo Charger

The DIY Power Bank Module is the complete electronic circuit board necessary to construct a powerful, customized portable charger from single 3.7V Li-ion or LiPo cells (such as 18650 or polymer packs). This versatile module performs two critical functions: charging the battery and boosting the voltage for device output.

For charging, the module accepts a standard 5V input via the Micro USB port and safely manages the 4.2V charging process using an intelligent built-in IC. When operating as a power bank, it efficiently uses a Step-Up (Boost) Converter to stabilize the 3.7V battery voltage to a fixed 5V DC output. With Dual USB Output ports, it can supply a combined output current of up to 2A, allowing simultaneous charging of two smartphones or tablets. Key features include integrated Under-Voltage Protection (UVP) (cutoff at ∼2.9V), overcurrent protection, and a clear 4-LED display that indicates the battery's state-of-charge, making it easy to build a reliable and functional power bank at home.

🔧 Key Features  

• Functionality: Li-ion Charging (Micro USB) & 5V Boosting (USB Output).
   
• Battery Compatibility: Single 3.7V Li-ion/LiPo (e.g., 18650 cells wired in parallel).
   
• Output Ports: 2×USB Type-A Female (Simultaneous charging).
 
• Max Output Current (Total): 2A (5V output Boost function).
 
• Display: 4-level LED indicator (25%,50%,75%,100%) for power status.
 
• Protection: Built-in Over-Current, Over-Voltage, and Under-Voltage Protection.
 

💡 Applications

• Custom assembly of 18650 cell Power Banks for mobile charging.
   
• Integration into portable electronic devices requiring 5V supply from single cells.
 
• Solar charging stations for USB devices.
 
• Creating portable power for Arduino, Raspberry Pi, or LED strips.
 

⚙️ Technical Specifications Summary

📦 Package Includes   

• 1 × DIY Power Bank Module with Dual USB Output