diymore X13129
diymore 18650 Battery Holder Double Li-ion V8 Battery Shield User Manual
Model: X13129
1. Introduction
The diymore 18650 Battery Holder Double Li-ion V8 Battery Shield is a versatile power management module designed for various electronics projects, including Raspberry Pi and Arduino. It functions as a power bank and charging module for 18650 Li-ion batteries, providing stable 3V and 5V outputs. This manual provides essential information for the safe and effective use of your device.

Figure 1: diymore 18650 Battery Holder Double Li-ion V8 Battery Shield
2. Safety Information
Please read and understand all safety precautions before operating this module. Failure to do so may result in damage to the module, connected devices, or personal injury.
- Battery Polarity: Special attention: the installation of the battery must be determined positive and negative. The board has been clearly marked with positive and negative indicators. Installation errors will burn out the module.
- Battery Type: This module is designed for 18650 Li-ion batteries. It is recommended to use two 18650 batteries, each with a length of 65mm.
- Operating Environment: Recommended for indoor use. Avoid exposure to moisture, extreme temperatures, or corrosive environments.
- Overload Protection: Do not exceed the specified voltage and current outputs (5V 2.2A, 3V 1A) to prevent damage.
- Disassembly: Do not attempt to disassemble or modify the module. Unauthorized modifications may void the warranty and pose safety risks.
3. Product Features
The diymore 18650 Battery Holder offers a range of features for your power needs:
- Supports up to two 18650 Li-ion batteries.
- Provides 5V 2.2A voltage output.
- Provides 3V 1A voltage output.
- Micro USB charging current: 600mA-800mA.
- Integrated V8 Battery Shield for protection.

Figure 2: Key Features and Voltage Outputs
4. Components and Package Contents
The package includes the following:
- 1 x diymore 18650 Battery Holder Double Li-ion V8 Battery Shield Module
Note: 18650 batteries are not included and must be purchased separately.
5. Setup Guide
Follow these steps to set up your diymore Battery Shield:
- Prepare Batteries: Ensure you have two charged 18650 Li-ion batteries (65mm length recommended).
- Insert Batteries: Carefully insert the 18650 batteries into the battery holders on the module. Pay close attention to the polarity markings (+ and -) on the board and the batteries. Incorrect insertion will damage the module.
- Initial Power On: After inserting batteries, press the ON/OFF button to activate the module.

Figure 3: Correct Battery Insertion

Figure 4: Component Layout and Port Identification
6. Operating Instructions
This module provides multiple ways to power your projects and charge the installed batteries.
6.1. Power Output
- USB 5V Output: Connect your device to the standard USB-A port for 5V power output (up to 2.2A).
- 3V Output Port: Utilize the dedicated 3V output pins for devices requiring 3V power (up to 1A).
- 5V Output Port: Utilize the dedicated 5V output pins for devices requiring 5V power (up to 2.2A).
6.2. Charging the Module
The module can be charged via its Micro USB port.
- Connect a Micro USB cable to the module's Micro USB port and to a suitable 5V USB power source (e.g., wall adapter, computer USB port).
- The charging current is approximately 600mA-800mA.
- Charging indicators (if present) will show the charging status.
6.3. Automatic Shutdown/Power On
The module features an automatic shutdown/power on mode when in a non-working state to conserve battery life. Press the ON/OFF button to re-enable output if it has shut down.
7. Maintenance
To ensure the longevity and optimal performance of your diymore Battery Shield:
- Keep the module clean and free from dust and debris. Use a soft, dry cloth for cleaning.
- Store the module in a cool, dry place when not in use.
- Avoid dropping or subjecting the module to strong impacts.
- Regularly check battery contacts for corrosion and clean if necessary.
8. Troubleshooting
If you encounter issues with your diymore Battery Shield, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Module does not power on. | Incorrect battery insertion, low battery charge, module in auto-shutdown. | Check battery polarity. Charge batteries. Press the ON/OFF button. |
| No output voltage. | Module not active, short circuit on output, low battery. | Press ON/OFF button. Disconnect load and retest. Charge batteries. |
| Module shuts off unexpectedly. | Low current draw (auto-shutdown feature). | This is a design feature for low power consumption. For continuous operation with very low loads, a periodic "tickle" of the enable button may be required (advanced users). |
| Module gets hot during charging/use. | Overload, faulty battery, poor ventilation. | Reduce load. Check batteries for damage. Ensure adequate airflow around the module. |
9. Specifications
| Attribute | Detail |
|---|---|
| Model Number | X13129 |
| Brand | diymore |
| Battery Type Supported | 18650 Li-ion (up to two) |
| 5V Output | 5V 2.2A |
| 3V Output | 3V 1A |
| Charging Input | Micro USB |
| Charging Current | 600mA-800mA |
| Item Weight | 0.317 ounces |
| Package Dimensions | 4.57 x 3.98 x 0.98 inches |
| Date First Available | June 14, 2019 |
10. Warranty and Support
For warranty information or technical support, please contact diymore customer service through their official website or the platform where the product was purchased. Keep your purchase receipt as proof of purchase.
You can visit the diymore store for more information: diymore Store
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