LED Dual USB 5V 2.4A Type-C 18650 Charging Module Power Bank Board

LED dual USB charging module with Micro/Type-C input, 18650 battery charge/discharge. Dual USB 5V/2.4A output, LED digital display shows battery level. Built-in overcharge, overdischarge, overcurrent, short circuit protection. 90% efficiency, compact size for DIY power bank

18650 Charging Module Application Features

Core Functions

◆ Charge & Discharge
Supports 18650 Li-ion battery charging and 5V boost output

◆ Input Ports

• Type-C (primary)

• Micro USB

◆ Output Ports
Dual USB-A (charge 2 devices simultaneously)

Electrical Specifications

◆ Input Voltage
5V via Micro/Type-C

◆ Output Voltage
Regulated 5V DC

◆ Output Current
Up to 2.4A total (shared)

◆ Charge Current
~1A typical

◆ Efficiency
Up to 90%

Protection Features

◆ Overcharge
4.2V±0.05V cutoff

◆ Overdischarge
3.0V±0.1V cutoff

◆ Other Protection
Overcurrent, short circuit

LED Display

◆ Display Type
LED digital screen

◆ Display Content
Battery level percentage

◆ Operation Logic
Auto-on during charge/discharge, sleep after ~30 sec

Physical Specifications

◆ Battery Type
Single or parallel 18650 Li-ion

◆ Battery Connection
B+/B- solder pads

◆ PCB Size
Approx. 55×19×8mm

Applications

◆ Target Use
DIY power bank projects

◆ Typical Uses

• Portable power bank DIY

• 18650 battery charger

• USB power supply

• Electronics projects

  
  

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Notes : Since the prices of the electronic components are unstable, the prices we show are for reference only. Please confirm the recent prices with us before ordering!

Lead Time : Usually, your parcel will be arranged within 7 days after finishing payment. We'll send it more quickly if it's an urgent order. Thanks for your understanding!

Quantity(Pieces)	1 ~ 30000	30001 ~ 300000	> 300000
Est. Time(days)	5	7	To be negotiated

FAQ:

1. What is this LED dual USB 5V 2.4A Type‑C power bank module and its key specifications?
   This module is a compact power bank management board that integrates a single‑cell lithium battery charger, a boost converter to generate 5 V, and a digital LED display for battery level. Key specifications: input via USB Type‑C (5 V), dual USB‑A outputs with a combined maximum current of 2.4 A (typically supports 2.4 A per port on some models or 2.4 A total; check your specific board). It charges a single 18650 Li‑Ion cell (3.7 V) at up to 1 A and provides multiple protections (over‑charge, over‑discharge, over‑current, short‑circuit). The LED percentage display (0 %–100 %) or voltage display shows the battery status. The board is widely used to build DIY power banks, portable chargers, and battery‑backed projects.

2. How do I connect an 18650 battery and use the module as a power bank?
   Wiring is very simple. The board has BAT+ and BAT‑ pads (or a battery holder). Solder a 18650 cell to these pads, respecting the correct polarity (critical!). Once the battery is connected, plug a USB Type‑C cable into the input to charge the battery — the LED display will light up and show the charging progress. To use it as a power bank, simply connect your device (phone, tablet) to one of the USB‑A output ports; the module automatically boosts the battery voltage to 5 V. The on‑board button can be used to wake the display or check the battery level when not charging.

3. What do the LED display and the button do?
   The module typically features a dual 7‑segment LED display that shows the battery percentage (0 %–100 %) or sometimes the voltage. When you press the on‑board button or connect a load, the display turns on and shows the current battery level for a few seconds. During charging, the display usually stays on and may flash or animate to indicate charging status. Once fully charged, it shows 100 % and stops charging. The button also serves as a power‑on trigger for the output in some designs — if the output is off, pressing the button activates the boost converter.

4. What is the maximum output current, and can I charge two devices at once?
   The module is rated for a combined output current of up to 2.4 A. Depending on the specific board version, it may support 2.4 A per single port, but the total across both ports is usually limited to 2.4 A or slightly higher. You can charge two devices simultaneously; the current will be shared. If both devices together draw more than the rated current, the over‑current protection will shut down the output to protect the battery and board. For the fastest charging, use one port at a time with a capable cable.

5. How long does it take to charge an 18650 battery with this module?
   Charging time depends on the battery capacity. The module charges at a typical current of ~1 A (set by the on‑board charger IC, often a TP4056 or similar). For a 2000 mAh cell, a full charge takes about 2.5 – 3 hours. For a 3000 mAh cell, expect 3.5 – 4 hours. The LED display shows the progress as a percentage. The charging stops automatically when the battery reaches 4.2 V, and the display shows 100 %. Some modules also have a small charging indicator LED (red while charging, green/blue when full).

6. What protection features does this power bank module include?
   The board incorporates a comprehensive set of safety features: over‑charge protection (stops charging at 4.25 V ± 0.05 V), over‑discharge protection (cuts off the output when the battery drops to about 2.9 V – 3.0 V to prevent deep discharge), over‑current protection on the output, and short‑circuit protection. These are usually implemented by a dedicated battery protection IC (DW01 + 8205A) combined with the charger IC. The module also provides temperature protection via the charger chip. Always use a quality 18650 cell and avoid physical damage to the board.

7. What type of 18650 batteries can I use? Are protected cells required?
   You must use standard 3.7 V Li‑Ion cylindrical 18650 cells. The module is designed for a single cell. You can use flat‑top or button‑top cells as long as they fit the holder. Protected cells (with a built‑in protection PCB) are generally too long to fit the on‑board holder and may interfere with the module’s own protection. It is best to use unprotected, high‑quality cells (e.g., from Samsung, Panasonic, LG) and let the module’s protection circuit manage the battery. Never use a damaged cell or mix different types/capacities in parallel.

8. Can I use this module to charge a lithium battery while simultaneously powering a load?
   The module supports pass‑through charging: when the Type‑C input is connected, the boost converter can remain active, and the USB outputs will deliver power while the battery charges. However, this can cause additional heat and may reduce the charging speed. It is generally safe, but for high‑load devices, it is recommended to charge the power bank without a load connected to keep the module cool and extend its life.

9. How does this module compare to other DIY power bank modules?
   Compared to basic modules without a display, this board offers a clear, easy‑to‑read LED percentage display, which is very convenient for knowing the exact remaining capacity. It also typically supports higher total output current (up to 2.4 A) than simpler 1 A modules. The Type‑C input is reversible and robust. Some similar modules use a monochrome LCD or a single LED bar; the dual 7‑segment LED is bright and visible in any light. This makes it an excellent choice for building a modern, user‑friendly DIY power bank.

10. Why does my module get warm or not charge at full speed?
    Warmth during charging or discharging is normal. The boost converter and charging IC dissipate heat, especially at high currents. Ensure the module has some ventilation — do not wrap it in insulation. If charging is slow, check that you are using a good quality USB cable and a power source capable of delivering 5 V / 1 A or more. A weak power source (e.g., a computer USB port limited to 500 mA) will significantly extend charging time. Also, dirty or oxidized battery contacts can cause resistance and reduce charging efficiency — clean them with isopropyl alcohol if needed.