USB 5V Step-Up Booster - Lithium Battery Charging and Protection Module for Power Bank

USB 5V Step-Up Booster - Lithium Battery Charging and Protection Module (1A Power Bank DIY)

This compact module is the ideal core component for building your own DIY Power Bank. It is an all-in-one solution that handles every necessary function for a single 3.7V Lithium-Ion or Li-Po cell: charging the cell, protecting it, and converting its low voltage into a stable 5V USB output capable of charging smartphones or powering microcontrollers like Arduino or Raspberry Pi.

For charging, the module accepts a standard 5V input via its Micro USB port and uses the CC/CV method to safely charge the battery to its precise 4.2V limit. When discharging, the integrated Step-Up (Boost) Converter circuitry efficiently converts the battery's voltage (3.7V nominal) up to a stable 5V output at the USB port, delivering up to 1A to 1.2A of current with over 85% efficiency. Crucially, the module incorporates comprehensive protection circuits against overcharge, over-discharge (cutting off at 2.9V), short circuit, and overload, ensuring maximum safety and longevity for both the battery and the connected load.

🔧 Key Features  

• Functionality: Integrated Charger (Buck) and Booster (Boost).
   
• Charge Input: Micro USB (5V DC, 4.2V max to battery).
   
• Discharge Output: 5V USB Type-A Female Port (up to 1.2A).
   
• Efficiency: High ≥85% discharge conversion efficiency.
   
• Protection: Built-in Over-Discharge (2.9V), Overcharge (4.2V), and Short Circuit protection.
   
• Low Power: Ultra-low ≤8µA standby current when no load is connected.
 

💡 Applications

• DIY Portable Power Banks using 18650 or Li-Po batteries.
   
• Creating a stable 5V supply from battery power for Raspberry Pi or Arduino projects.
 
• Solar-powered USB charging solutions.
 
• Battery backup power for portable devices.
 

⚙️ Technical Specifications

📦 Package Includes   

• 1 × USB 5V Step-Up Booster / Power Bank Module