The Dual USB 5V 2.4A Power Bank Module is a high-efficiency power management solution designed for DIY portable chargers. At Electrapac, we recommend this board for makers looking to recycle old laptop batteries or build custom high-capacity power banks with professional-grade safety features.

Product Overview

This compact module is a "3-in-one" solution: it acts as a Lithium battery charger, a DC-DC step-up converter (boosting 3.7V to 5V), and a Battery protection circuit. Featuring both Micro-USB and USB Type-C inputs, it offers modern compatibility for charging your battery bank, while dual USB-A outputs allow you to charge two mobile devices simultaneously.

Key Features for Electrapac Customers

• Intelligent LED Display: Unlike simple LED dots, this board features a digital screen showing the exact battery percentage (0–100%) and whether the board is currently in "Input" or "Output" mode.

• Dual Device Charging: With a 2.4A total output, you can charge a smartphone and a low-power peripheral (like a smartwatch or wireless earbuds) at the same time.

• Modern Type-C Input: Enjoy the convenience of using your modern phone charger to refuel your DIY power bank.

• Advanced Safety Suite: * Overcharge Protection: Stops charging at 4.2V to prevent fire hazards.

  • Over-discharge Protection: Cuts power at 3.0V to preserve battery lifespan.

  • Short Circuit Protection: Instantly kills the output if a short is detected.

• High Efficiency: Low-heat DC-DC conversion ensures your energy goes into your phone, not into wasted heat.

Wiring & Assembly Guide

To build your Electrapac power bank safely, follow these wiring rules:

1. Parallel Connection Only: You can connect multiple 18650 cells to increase capacity, but they must be in parallel (all Positives together, all Negatives together). Do not connect them in series (7.4V+ will destroy the board).

2. Battery Polarity: Connect the Battery Positive to B+ and Negative to B-. Reverse polarity will instantly burn the control IC.

3. Activation: After connecting the battery for the first time, you may need to plug the module into a 5V charger to "activate" the circuit.

4. The Flashlight: Most models include a "Long Press" function on the side button to toggle a small onboard LED flashlight.

Primary Applications

• DIY Power Banks: Building high-capacity (10,000mAh+) portable chargers for travel.

• Portable Lab Power: Powering your Arduino or Raspberry Pi projects in the field.

• Battery Restoration: Repurposing healthy cells from old laptop batteries into a useful tool.

• Emergency Lighting: Creating a backup power source for LED strips during power outages.

• Solar Charging: Pairing with a 5V Solar Panel from www.electrapac.com for off-grid energy.

Why Shop at Electrapac?

We source our Power Bank Modules with high-quality inductor coils and thick copper traces to ensure stable 2.4A output without voltage sagging. At www.electrapac.com, we provide the modular components that turn loose batteries into sophisticated electronics.