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 1100% 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.
Parallel Setup only (Connect all + together and all - together)
Input Charging Port
Micro-USB / Type-C (5V / 2.0A Max)
Output Interfaces
2x Standard USB Type-A Ports
Output Voltages
5.0V DC (± 0.2V)
Output Currents
Port 1: 5V / 1.0A | Port 2: 5V / 2.1A
Display Unit
Backlit Blue/White LCD Matrix Screen
5. Critical Assembly Instructions
To prevent frying the internal display controller card during installation, please review these setup laws:
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.
Use Balanced Cells: Ensure all 18650 cells you place inside are at a similar voltage level before sealing the case.
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!
Weight
2000 g
Dimensions
15 × 10 × 5 cm
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