DIY Power Bank Kit with LCD Display – Dual USB 5V 2A Output Matte Shell Enclosure Case for 18650 Lithium Batteries

Overview

The Dual USB Power Bank DIY Kit is a sleek shell housing combined with an intelligent power management motherboard. Equipped with a clear backlit LCD Digital Display, this kit takes the guesswork out of battery levels by showing the exact remaining capacity from 0\% to 100\%, alongside active “IN” and “OUT” connection states.

It is designed for parallel 18650 Lithium-Ion battery installation. Whether you want to repurpose salvageable cells or load it up with brand-new, high-drain batteries for maximum runtime, this kit is perfect for engineering students, campers, and electronics hobbyists alike.

Key Features

• Real-Time LCD Readout: Crystal-clear digital display monitors remaining battery life percentage and tells you exactly which port is active.

• Dual Device Charging: Features twin USB Type-A output ports rated at 1A and 2A to charge accessories or smartphones quickly.

• Smart Charging Protections: Built-in hardware safeguard prevents battery over-charging, over-discharging, and protects against external short circuits.

• Integrated Emergency Flashlight: Includes a built-in white LED bead that serves as a useful flashlight, activated with a simple double-press of the power switch.

• Solder-Friendly Design: Features robust, clearly marked terminal pads on the motherboard for clean, reliable assembly.

Technical Specifications

5. Critical Assembly Instructions

To prevent frying the internal display controller card during installation, please review these setup laws:

1. Verify Orientation: Lithium cells must be connected strictly in Parallel ($B+$ to positive terminals, $B-$ to negative terminals). If you connect even one battery backward, or wire them in series (producing 7.4V+), the motherboard will instantly burn out.

2. Use Balanced Cells: Ensure all 18650 cells you place inside are at a similar voltage level before sealing the case.

3. One-Way Snap Shell: Most DIY power bank cases use heavy-duty security clips. Test your internal wiring completely before snapping the outer cover shut, as reopening the shell without scratching the plastic can be very difficult!