YDuupxe YDuupxeoe31urm72b
USB Battery Charging Board User Manual
Model: YDuupxeoe31urm72b
1. Introduction
This manual provides detailed instructions for the safe and efficient use of the YDuupxe USB Battery Charging Board. Please read this manual thoroughly before operating the device to ensure proper functionality and to prevent damage.
The YDuupxe USB Battery Charging Board is a compact and highly integrated module designed for charging batteries and providing a stable 5V/1A output. It features high discharge efficiency and robust construction for reliable performance.
2. Key Features
- High Integration Circuit: Simple external circuitry for enhanced reliability.
- High Discharge Efficiency: Up to 85% efficiency (3.7V input, 5V/1A output).
- Versatile Use: Functions as a USB charging board and a battery charger.
- Durable Construction: Made with high-quality electronic components for long service life.
3. Product Overview
Familiarize yourself with the components of the USB Battery Charging Board.

Figure 3.1: Top-down view of the USB Battery Charging Board, highlighting the USB-A output and micro-USB input ports.

Figure 3.2: Angled view of the USB Battery Charging Board, illustrating its compact design and the USB-A output port.

Figure 3.3: Side view of the USB Battery Charging Board, showing the USB-A port and indicator LEDs (LED1, LED2).

Figure 3.4: Bottom view of the USB Battery Charging Board, displaying the main integrated circuit (U1) and inductor (L1).
4. Specifications
| Parameter | Value |
|---|---|
| Input Voltage | 3.7V (typical for battery input) |
| Output Voltage | 5V |
| Output Current | 1A |
| Charging Current | Up to 1A |
| Discharge Efficiency | 85% (at 3.7V input, 5V/1A output) |
| Dimensions (L x W x H) | Approx. 7 x 6 x 1 cm |
| Weight | Approx. 8g per board |
| Model Number | YDuupxeoe31urm72b |
5. Setup Instructions
Follow these steps to set up your USB Battery Charging Board:
- Connect Battery: Connect your 3.7V battery to the B+ and B- pads on the board. Ensure correct polarity (B+ for positive, B- for negative). Incorrect connection can damage the board or battery.
- Input Power (Charging): To charge the connected battery, plug a standard Micro-USB cable into the Micro-USB port (J1) on the board and connect it to a 5V USB power source (e.g., a wall adapter, computer USB port).
- Output Power (Discharging): To use the board as a 5V power source, connect your device to the USB-A output port (J2). The board will draw power from the connected battery and convert it to 5V.

Figure 5.1: Connection points for battery input (B+ and B-).
6. Operating the Device
The board operates in two primary modes: battery charging and 5V power output.
6.1. Charging Mode
When a 5V power source is connected to the Micro-USB input, the board will begin charging the connected battery. The indicator LEDs provide status:
- LED1 (Red): Indicates charging in progress.
- LED2 (Green): Indicates charging is complete.
6.2. Discharge Mode (5V Output)
When a device is connected to the USB-A output port, the board will draw power from the battery and provide a regulated 5V output. This mode is active as long as the battery has sufficient charge.
The board includes discharge protection to prevent over-discharge of the connected battery, extending its lifespan.
7. Maintenance
The USB Battery Charging Board requires minimal maintenance. Follow these guidelines to ensure its longevity:
- Keep Dry: Avoid exposing the board to moisture or liquids.
- Clean Gently: If cleaning is necessary, use a dry, soft cloth. Do not use harsh chemicals or abrasive materials.
- Store Properly: When not in use, store the board in a cool, dry place away from direct sunlight and extreme temperatures.
- Handle with Care: Avoid dropping or subjecting the board to strong impacts.
8. Troubleshooting
If you encounter issues with your USB Battery Charging Board, refer to the table below:
| Problem | Possible Cause | Solution |
|---|---|---|
| Board not charging battery. | Incorrect battery polarity; faulty Micro-USB cable/power source; battery deeply discharged. | Verify battery connection polarity. Try a different Micro-USB cable and 5V power source. Allow deeply discharged batteries some time to initiate charging. |
| No 5V output from USB-A port. | Battery not connected or discharged; faulty USB-A cable; device drawing too much current. | Ensure battery is properly connected and charged. Try a different USB-A cable. Check if the connected device's current draw exceeds 1A. |
| LEDs not illuminating. | No power input; board malfunction. | Ensure 5V power is supplied to the Micro-USB input. If still no lights, the board may be faulty. |
9. Warranty and Support
For warranty information or technical support, please contact your retailer or the manufacturer, YDuupxe, through their official channels. Please have your model number (YDuupxeoe31urm72b) and purchase details ready when contacting support.
For further assistance, you may visit the product page on Amazon.de: Product Link
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