1. Introduction
This manual provides detailed instructions for the safe and effective use of your WITERY Electric Hot Water Bag. This rechargeable heating pad is designed to provide warmth and relief for various discomforts, including cramps, sore muscles, and general cold. Please read this manual thoroughly before first use and keep it for future reference.
2. Product Features
- Rechargeable Design: No need to boil, microwave, or constantly refill water.
- Thickened PVC Material: Constructed with 6 layers of eco-friendly PVC for explosion-proof, high-temperature resistance, and durability.
- Soft Plush Cover: Full-wrap, breathable plush cover for comfort and protection against direct heat.
- Automatic Shut-off: Built-in safety feature to prevent overheating.
- Quick Heating: Reaches optimal temperature in 10-15 minutes.
- Long-lasting Warmth: Retains heat for up to 5 hours.
- Versatile Use: Ideal for hands, feet, stomach, waist, and for relieving minor aches, pains, arthritis, cramps, muscle recovery, and sports injuries.

Image showing the dimensions of the hot water bag and charger, highlighting key features like thickened PVC, cozy warm plush, and explosion-proof charger.

Diagram illustrating the multi-layered, premium thick PVC material construction of the hot water bag, emphasizing its explosion-proof, leak-proof, and heat preservation qualities.
3. Important Safety Information
Read all instructions before use. Failure to follow these instructions may result in electric shock, fire, or serious injury. Keep this manual for future reference.
- Do not open or attempt to refill the water bag. It is pre-filled and sealed.
- Use only the provided charger. Using an unauthorized charger may cause damage or fire.
- Do not use if the bag or charger appears damaged, cracked, or leaking.
- Do not immerse the bag or charger in water or any other liquid.
- Keep out of reach of children and pets during charging and use.
- Do not use while sleeping or if you are unable to feel heat adequately (e.g., due to certain medical conditions).
- Disconnect from power immediately after charging is complete. Do not leave unattended while charging.
- Avoid direct contact with skin for prolonged periods if the heat feels too intense. Always use the plush cover provided.
- Do not puncture, cut, or apply excessive pressure to the bag.
- Store in a cool, dry place when not in use.

Image showing a person relaxing with the hot water bag, with an inset highlighting the internal heating element and automatic shut-off feature for safety.
4. Setup
Your WITERY Electric Hot Water Bag comes pre-filled with water and is ready for use after charging.
- Unpack the hot water bag and charger from the packaging.
- Ensure the hot water bag is clean and dry before first use.
- Place the hot water bag on a flat, stable, and heat-resistant surface for charging.

A four-panel image demonstrating the quick and easy heating process: 1. Place on a flat surface, 2. Turn on the charger port, 3. Connect to charging port, 4. Plug into adapter and heat for 8-12 minutes.
5. Operating Instructions
5.1. Charging the Hot Water Bag
- Lay the hot water bag flat on a stable surface.
- Open the protective cover over the charging port on the bag. Ensure there are no obstructions.
- Insert the charging clip of the power cord firmly into the charging port.
- Plug the power adapter into a standard electrical outlet.
- The indicator light on the charger will illuminate, indicating that charging has begun.
- Allow the bag to charge for approximately 10-15 minutes. The indicator light will turn off automatically when the bag reaches its optimal temperature and charging is complete.
- Once the light turns off, immediately disconnect the charger from the bag and the wall outlet.
5.2. Using the Heated Bag
After charging, the hot water bag is ready to provide warmth.
- Place the heated bag on the desired body area (hands, feet, stomach, waist, etc.) for pain relief or warmth.
- Always use the soft plush cover to prevent direct contact with the heated surface, especially for sensitive skin.
- The bag will retain heat for up to 5 hours, depending on ambient temperature and usage.
Official product video demonstrating the use and features of the WITERY Electric Hot Water Bag, including its soft cover and quick heating.
6. Maintenance and Care
- Cleaning: Wipe the exterior of the hot water bag with a damp cloth. Do not use abrasive cleaners or immerse in water. Ensure the charging port is dry before charging.
- Storage: When not in use, store the hot water bag in a cool, dry place, away from direct sunlight and extreme temperatures. Ensure it is completely cool before storing.
- Longevity: To prolong the life of your hot water bag, avoid placing heavy objects on it and do not fold it tightly when hot.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Bag does not heat up. | Not plugged in correctly; Charger malfunction; Internal issue. | Ensure charger is securely connected to both the bag and the power outlet. Check if the indicator light illuminates. If not, try a different outlet. If the problem persists, discontinue use and contact customer support. |
| Indicator light stays on. | Overheating protection not triggered; Faulty sensor. | Disconnect immediately. Allow to cool down. If it happens repeatedly, discontinue use and contact customer support. |
| Bag feels too hot. | Direct skin contact; Overcharged. | Always use the plush cover. Disconnect charger once the light turns off. Do not overcharge. |
| Leakage observed. | Damage to the bag; Manufacturing defect. | Discontinue use immediately. Do not attempt to repair. Contact customer support for replacement. |
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | WTR-NA4002-11 |
| Dimensions | 9.45 x 6.69 x 2.76 inches |
| Weight | 3.3 Pounds |
| Heating Time | 10-15 minutes |
| Heat Retention | Up to 5 hours |
| Material | Thickened Eco-friendly PVC (6 layers), Plush Cover |
| Safety Features | Automatic Shut-off, Explosion-proof |
| Country of Origin | China |
9. Warranty and Support
For warranty information or technical support, please refer to the product packaging or contact WITERY customer service directly. You can visit the official WITERY store on Amazon for more information:





