🔋 Key Features:

✔ Dual USB Outputs (5V/2.4A Max) – Fast-charge two devices simultaneously (smartphones, tablets, Bluetooth earbuds, etc.). ✔ Real-Time LED Voltage Display – Shows remaining battery power (3.3V–4.2V range). ✔ 18650 Battery Compatible – Works with single or dual 18650 Li-ion cells (parallel connection for extended capacity). ✔ Smart Charging & Protection – Auto-cutoff, overcharge/over-discharge protection, short-circuit prevention. ✔ Micro USB Input (5V/1A) – Recharge your 18650 battery safely via any USB adapter. ✔ Compact & Lightweight – Easy to integrate into DIY power banks, solar chargers, or emergency kits. ✔ Boost Efficiency >85% – Stable 5V output with minimal power loss.

📊 Technical Specifications:

• Input (Charging): 5V/1A (Micro USB)

• Output (Discharging): Dual USB (5V/2.4A total, shared between ports)

• Supported Batteries: 1x or 2x 18650 Li-ion (3.7V, parallel connection recommended)

• Charging Cutoff: 4.2V ±1% (auto-stop when full)

• Low-Voltage Protection: Shuts off at <2.8V to prevent battery damage

• Efficiency: ≥85%

• LED Display: Shows real-time battery voltage (e.g., 3.7V = ~50% charge)

• Dimensions: Approx. 60mm x 25mm x 10mm (varies by model)

🔌 Wiring & Usage:

1. Connect 18650 batteries in parallel (for higher capacity) or use a single cell.

2. Charge via Micro USB (red LED = charging, off = fully charged).

3. Power devices via USB ports—LED display shows remaining voltage.

⚠ Note: Batteries not included. Use protected 18650 cells for safety.

🛠 Applications:

✅ DIY power banks & portable chargers ✅ Emergency backup power for phones ✅ Solar-powered USB chargers ✅ Camping, travel, or off-grid power solutions ✅ Custom electronics & hobby projects

📦 Package Includes:

• 1× Dual USB 5V 2.4A Power Bank Module (LED display)

• Pre-soldered battery +/- terminals

• Micro USB charging port

💡 Why Choose This Power Bank Board?

✔ Affordable & Reliable – Better than pre-built power banks for customization. ✔ Fast Dual Charging – Share power with two devices at once. ✔ Battery Protection – Prevents overcharging/over-discharging. ✔ Clear Power Monitoring – LED display eliminates guesswork.

Upgrade Your DIY Power Solutions Today! Ideal for makers, survivalists, and tech enthusiasts who need a compact, efficient way to harness 18650 battery power.