1. Introduction
This manual provides instructions for the safe and effective use of your VVHOOY 5V 5000mAh Li-Polymer rechargeable batteries. These batteries are designed to power 5V heated wearable products, such as heated socks, offering portable and adjustable warmth. Please read this manual thoroughly before initial use and retain it for future reference.
2. Package Contents
Verify that all items are present in your package:
- 2 x VVHOOY 5V 5000mAh Rechargeable Li-Polymer Batteries
- 1 x Type-C 2-in-1 Charging Cable
3. Product Overview
The VVHOOY 5V 5000mAh Li-Polymer batteries are compact and designed for compatibility with various 5V heating equipment. Each battery features a power button, battery level indicators, and temperature setting indicators.

Image 3.1: Battery Components. A close-up diagram of the VVHOOY 5V 5000mAh battery, highlighting the Type-C input port, DC output port, power button, temperature level indicators (1-4), and battery level indicators (25%, 50%, 75%, 100%). An external DC plug is shown connected.
Key Features:
- Output: 5V/2A via DC port, compatible with ZUOYI, Baowenqier, KEKELAN, and other 5V heating equipment.
- Input: 5V/2A via USB Type-C port for convenient charging.
- Temperature Control: 4 adjustable heating levels.
- Portability: Mini size, approximately 0.237 pounds (107g) per unit.
- Safety Protections: Includes short circuit, high temperature, high voltage, and over-charge protection.

Image 3.2: Battery Safety Features. A banner image featuring two VVHOOY 5V 5000mAh batteries with icons representing safety features: Short Circuit Protection, High Temperature Protection, High Voltage Protection, and Over-charge Protection.
4. Setup
4.1 Initial Charging
Before first use, fully charge both batteries to ensure optimal performance and battery health. Charging typically takes 5-6 hours for a full charge.
- Connect the provided Type-C 2-in-1 charging cable to the Type-C input port on each battery.
- Connect the USB end of the charging cable to a compatible USB wall adapter (not included) with a 5V/2A output.
- The battery level indicators will illuminate during charging, showing the charging progress. All four lights will be solid when fully charged.

Image 4.1: Charging Process. An illustration depicting two VVHOOY 5V 5000mAh batteries being charged simultaneously from a wall outlet using a USB adapter and a 2-in-1 Type-C charging cable. A clock icon indicates a 5-6 hour charging time for full capacity.

Image 4.2: USB Plug Requirement. An illustration showing two VVHOOY 5V 5000mAh batteries and a Type-C 2-in-1 charging cable, with an arrow pointing to a USB wall adapter. Text emphasizes that the USB plug is not included and requires a 5V 2A output adapter.
4.2 Connecting to a Heated Device
Once charged, connect the battery to your compatible 5V heated product.
- Locate the DC input port on your heated device (e.g., heated socks).
- Plug the DC output cable from your heated device into the DC output port on the VVHOOY battery.

Image 4.3: Connection and Activation. A three-panel image demonstrating 'How to Use' the battery: 1) Plug your heating product to our battery, 2) Press the button to activate the battery, 3) Charge the battery using the Type-C interface.
5. Operating Instructions
5.1 Power On/Off
- To turn on the battery, long press the power button (marked with a power symbol). The battery level indicators and temperature level indicators will light up.
- To turn off the battery, long press the power button again until the lights turn off.
5.2 Adjusting Temperature Settings
The battery features 4 heating levels, allowing you to customize your warmth.
- After powering on, short press the power button to cycle through the temperature settings.
- Each short press will advance to the next heating level (Level 1 to Level 4).
- The temperature indicator lights (1-4) will show the currently selected level.
| Level | Description | Indicator Lights |
|---|---|---|
| Level 1 | Low Temperature | 1 light |
| Level 2 | Mid Temperature | 2 lights |
| Level 3 | Mid-High Temperature | 3 lights |
| Level 4 | High Temperature | 4 lights |

Image 5.1: Temperature Settings. A diagram illustrating the 4-level temperature settings of the VVHOOY 5V 5000mAh battery. It shows four green lights for power indication and four blue lights for temperature levels, corresponding to Level 1 (low) through Level 4 (high).
5.3 Battery Level Indication
The battery features four small lights indicating the remaining charge:
- 1 light: 1%-25% charge remaining
- 2 lights: 26%-50% charge remaining
- 3 lights: 51%-75% charge remaining
- 4 lights: 76%-100% charge remaining
6. Maintenance
6.1 Battery Care for Long Life
- Regular Charging: If not using the batteries for extended periods, recharge them every 3 months to maintain battery health and prevent deep discharge.
- Cleaning: Always remove the battery from your heated device before washing the device to prevent damage to the battery and the device.
- Storage: Store batteries in a cool, dry place away from direct sunlight and extreme temperatures.
7. Troubleshooting
If you encounter issues with your VVHOOY batteries, refer to the following common solutions:
- Battery not charging:
- Ensure the charging cable is securely connected to both the battery and the USB power adapter.
- Verify that the USB power adapter has a 5V/2A output and is functioning correctly. Try a different adapter if available.
- Check for any visible damage to the charging cable or battery ports.
- Heated device not turning on or heating:
- Confirm the battery is fully charged.
- Ensure the battery is properly connected to the heated device via the DC port.
- Long press the power button on the battery to ensure it is turned on.
- Check if the heated device itself is functioning correctly with another power source if possible.
- Short battery life:
- Battery life is significantly affected by the selected heating level. Higher settings consume more power.
- Ensure the battery was fully charged before use.
- Extreme cold environments can reduce battery efficiency.
8. Safety Information
Please observe the following safety precautions:
- Do not expose batteries to water, fire, or extreme temperatures.
- Do not puncture, disassemble, or modify the batteries.
- Keep batteries away from children and pets.
- Dispose of batteries according to local regulations. Do not dispose of with household waste.
- Use only the provided charging cable and a compatible 5V/2A USB adapter for charging.
- If the battery shows signs of swelling, leakage, or damage, discontinue use immediately.
9. Specifications
| Feature | Detail |
|---|---|
| Model Name | 5V battery |
| Brand | VVHOOY |
| Battery Cell Composition | Lithium Polymer |
| Capacity | 5000mAh |
| Input | Type-C 5V/2A |
| Output | DC 5V/2A |
| Number of Batteries | 2 (included) |
| Item Weight (per unit) | 7.4 ounces (approx. 210g for 2 units, 105g per unit) |
| Package Dimensions | 4.8 x 3.94 x 0.83 inches |
| ASIN | B0DKTBCHRM |
| Date First Available | October 24, 2024 |
10. Warranty and Support
For warranty information or technical support, please refer to the product packaging or contact the manufacturer directly through their official channels. Keep your purchase receipt as proof of purchase.