Dual USB 5V 2A / 1A Power Bank DIY Charger Module with LCD Screen | Pro Tronix

Product Description

This advanced Dual USB Power Bank DIY Module is an all-in-one step-up booster and charging circuit upgraded with an integrated high-contrast LCD backlight display screen. Designed for building custom high-performance portable power banks, it is compatible with both 3.7V Lithium-Ion (18650) and Lithium-Polymer (Li-Po) cells connected in parallel. The module cleanly boosts variable battery voltages to a stable 5V DC output through two independent USB ports providing dedicated 1A and 2A current paths. The standout feature is the onboard LCD panel, which provides precise real-time diagnostic reporting by displaying exact battery percentage status and active input/output connection states. Complete with built-in protection against overcharging, over-discharging, and short-circuits, it offers a highly professional and interactive foundation for portable power systems, IoT nodes, and bench testing setups.

Pinout / Layout Connections

The board features clearly defined surface solder pads and integrated physical connection ports:

• Battery Input Terminals:

  • B+ Solder Pad: Connects directly to the positive terminal of the parallel 3.7V lithium battery bank.

  • B- Solder Pad: Connects directly to the negative terminal of the parallel 3.7V lithium battery bank.

• Output / Input Interfaces:

  • USB Port 1 (OUT 5V/1A): Type-A USB socket optimized for standard electronic accessories and lower-drain microcontrollers.

  • USB Port 2 (OUT 5V/2A): Type-A USB socket optimized for fast-charging mobile hardware and single-board electronics.

  • Micro-USB / Type-C Input Port (IN 5V): Onboard input port utilized to safely recharge the connected battery bank from a standard 5V wall adapter.

• LCD Display Interface: Positioned on the upper side of the module, providing real-time alphanumeric stats for capacity percentage and connection paths (IN, OUT 5V 1A, OUT 5V 2A).

Applications

• Smart DIY Power Banks: Assembling premium portable power packs featuring precise visual percentage monitoring.

• Prototyping & Bench Power: Providing mobile, diagnostic-friendly 5V power sources for field-testing Arduino or ESP32 development boards.

• Portable Hardware Diagnostics: Real-time current distribution and voltage status validation for low-power mobile robotic platforms.

• Custom Emergency Systems: Engineering smart backup power equipment with reliable digital user interfaces.

Technical Specifications