Powerbank With 3 USB + Display Module

This is a multifunction power bank controller module with three USB outputs and a digital display, designed for DIY power banks and portable charging solutions. It integrates battery protection, boost conversion, fast-charge support, and real-time status indication in a single compact PCB.

Key Features:

• 3× USB output ports (typically 2× USB-A + 1× USB-C, layout dependent)
• Digital display showing battery percentage, charging status, and QC indicators
• Fast charging support (QC / fast-charge protocol, model dependent)
• Boost converter to step battery voltage up to stable 5 V output
• Battery protection (over-charge, over-discharge, over-current, short-circuit)
• Compact all-in-one design for DIY enclosures

Technical Specifications:

• Battery type: 3.7 V lithium (1S Li-ion / Li-Po)
• Input (charging):

  • Micro-USB / USB-C (varies by version)

  • 5 V input

• Output voltage: 5 V
• Output current:

• • Up to 2.1–2.4 A per port (shared total current limited)

• Display:

  • Battery level (%)

  • IN / OUT status

  • Fast-charge indicator

• Conversion efficiency: ~85–92% (load dependent)

Display Indicators:

• Battery percentage (0–100%)
• Charging / discharging state
• Fast-charge (QC) symbol
• Port activity

Applications:

• DIY power banks
• Portable phone chargers
• Backup USB power supplies
• Custom battery enclosures
• Embedded charging projects