Dual USB 1A/2A Mobile Power Bank Charger Module 3.7-5V Booster

A dual USB output power bank module boosting 3.7 V Li-ion battery voltage to 5 V USB output at 1 A (USB 1) and 2 A (USB 2) — with Micro USB charging input. Supports 1–2 × 18650 cells and includes LED battery level indicators for a polished, functional DIY power bank.

🔹 Key Applications

• 2-cell DIY power bank construction
• Dual-device simultaneous USB charging
• High-capacity portable project power supply
• Solar battery bank with dual USB output
• Emergency backup dual USB charger

🔹 Why Choose This Module?

• Dual USB output — charge two devices simultaneously at 1 A + 2 A
• 2 A high-speed output — fast charges modern phones
• 1–2 × 18650 cells — scalable capacity
• LED battery level indicators — 4-bar state display
• Micro USB charging input — standard cable compatible

🔹 Technical Specifications

• Input: Micro USB 5 V
• Battery: 1–2 × 18650 (3.7 V)
• USB Output 1: 5 V / 1 A
• USB Output 2: 5 V / 2 A
• Indicators: 4-LED battery level

🔹 What's Included

1 × Dual USB Power Bank Module (18650 cells not included)

🔹 Pro Tip

💡 Use two matched 18650 cells in parallel for doubled capacity. Samsung INR18650-30Q or LG HG2 cells are recommended for genuine 3000 mAh capacity. Charge the cells to the same voltage before paralleling to prevent high equalisation currents between them.

⚠️ Note: Always ensure proper heat dissipation and correct voltage configuration before powering connected devices.