SPECIFICATIONS

Build Your Custom Power Bank Easily! 5V 2A Type-C Charge-Discharge Boost Module with LED Display & Protection, The Perfect Core for DIY Power Banks.

Key Features & Benefits

🔋 All-in-One Charge & Discharge: Integrates Type-C charging and 5V boost output on one board. Supports passthrough charging, simplifying DIY.

📊 4-Level LED Power Display: 4 LEDs clearly indicate battery level (25%, 50%, 75%, 100%) for clear status at a glance.

⚡ Stable 5V 2A Fast Output: Efficient synchronous boost circuit provides steady 5V/2A output to charge phones, tablets, and more.

🛡️ Comprehensive Safety Protection: Built-in Li-ion charge management (4.2V/4.35V selectable), over-discharge, output over-current, and short-circuit protection.

🔌 Modern Type-C Input: Universal Type-C port compatible with standard 5V chargers.

🛠️ Two Versions for Flexibility: Choose between USB-A Port Pre-soldered (ready to use) or No USB Port (full DIY) to match your needs.

Product Description

This module is the ideal heart for your DIY high-performance mini power bank. It combines charging management, boost conversion, power display, and multiple protections on a compact board. Just add a common 3.7V Li-ion battery (like 18650 or 21700) and a case to quickly assemble a fully-featured, reliable personal charger. Perfect as a daily emergency power source or a 5V power supply for your electronic projects.

🚨 Critical User Guide: Read Before Purchase & Use!

❌ 【What This IS & IS NOT】: This is a “Li-ion Battery Management Controller Board”, NOT a plug-and-play finished power bank!

You need to provide your own battery, case, and charger to make it functional.

⚠️ 【Key SKU Difference & Requirements】

1. The Most Important Choice: The key difference is whether the USB output port is soldered.

"USB Port Soldered" Version: Output port is pre-soldered, ready to use.

"No USB Port" Version: Has only solder pads. You MUST solder a USB-A female port yourself to connect a charging cable.

Please choose the correct SKU based on your soldering skill!

2. Required Components:

To use this module, you MUST have: ① A single 3.7V Li-ion battery (recommended 18650/21700 with protection circuit), ② A 5V Type-C charger, ③ A power bank case.

3. Critical Wiring Warning:

The Type-C port is for 5V INPUT (charging) ONLY. ABSOLUTELY FORBIDDEN to connect battery terminals directly to the Type-C port or the output terminals, as this will permanently damage the module!

✅ 【Required Setup & Steps】

1. Confirm Version & Prepare: Confirm your SKU and prepare battery, case, cables.

2. Connect Battery: Connect the battery positive/negative to the module's B+ and B- terminals.

3. Charging Test: Use a 5V Type-C charger. Observe the red charging indicator.

4. Discharging Test: Connect a phone via the pre-soldered USB port or your own soldered port to test output.

🔧 【Important Notes & Compatibility】

Charge Voltage Selection: A jumper on board selects charge cutoff voltage: 4.2V (standard Li-ion) or 4.35V (high-voltage Li-ion). Set according to your battery.

Auto-Shutdown: The 5V output automatically turns off when load current stays below 50mA for ~30 seconds to save power. Press an external button or reconnect load to wake.

Display Logic: LEDs show battery level during discharge. Only red LED indicates status during charging.

Specifications

Input Port: Type-C

Input Voltage: 5V - 5.5V

Charge Cut-off Voltage: 4.2V / 4.35V (Jumper Selectable)

Charge Current: 2.4A ±5%

Boost Output Voltage: 5V - 5.15V (with line loss compensation)

Max Output Current: 2A

Efficiency: Up to ~92.5% (3.6Vin, 5V/2A Out)

Display: 4-LED Battery Indicator

Quiescent Current: < 30μA

Main Application: DIY Power Bank, Portable Device Power Supply, Li-ion Battery Management Projects

Package Includes

1 x 5V 2A Charge-Discharge Boost Module

(A pre-soldered USB-A female port may be included depending on the SKU selected)