1. Introduction
Thank you for choosing the NEWDERY 10000mAh Battery Case for your Samsung Galaxy S25 Ultra 6.9". This product is designed to provide extended battery life, robust protection, and versatile charging capabilities for your device. Please read this manual carefully to ensure proper use and optimal performance.
2. Package Contents
- 1 x NEWDERY 10000mAh Battery Case for Samsung Galaxy S25 Ultra 6.9"
- 1 x USB-C to USB-C Charging Cable
- 1 x User Manual
Video: Unboxing the NEWDERY Samsung Galaxy S25 Ultra Battery Case, showing the case, USB-C cable, and user manual.
3. Product Features
- Extended Battery Life: Built-in 10000mAh battery provides significant extra power, allowing your phone to last longer throughout the day.
- LED Digital Display: Accurately shows the remaining battery level of the case, ensuring you always know how much power is available.
- Two-Way USB-C Fast Charging: Features a USB-C input and output port, supporting up to 20W output and 18W input for rapid charging of both the case and other devices.
- Upgraded Wireless Charging: Supports Qi wireless charging for your phone while in the case, and the case itself can be charged wirelessly.
- Data Sync & Android Auto & Wired Headset Support: Designed to retain all original phone port functions, allowing seamless data transfer, Android Auto connectivity, and use of wired headsets without removing the case.
- MAX Protection: Durable hard-shell design with raised sides protects your phone from scratches, drops, impacts, and daily wear and tear.

Image: Visual comparison highlighting the NEWDERY case's USB-C input/output, digital display, and ability to charge two devices simultaneously.
4. Setup
4.1. Installing Your Phone
- Gently bend the top flexible edge of the battery case.
- Slide your Samsung Galaxy S25 Ultra into the case, ensuring the USB-C connector aligns properly.
- Push the phone fully into the case until it is securely seated.
4.2. Removing Your Phone
- Gently bend the top flexible edge of the battery case.
- Carefully pull your Samsung Galaxy S25 Ultra out of the case.

Image: The flexible top edge of the battery case allows for easy insertion and removal of the phone.
5. Operating Instructions
5.1. Charging Your Phone (Wireless)
- Ensure your Samsung Galaxy S25 Ultra is correctly installed in the battery case.
- Press the power button on the back of the case once to initiate wireless charging for your phone. The LED display will show the battery percentage.
- Double-click the power button to stop charging.
Video: Demonstrates how to wirelessly charge the phone by pressing the power button on the battery case.
5.2. Charging the Battery Case
- Wired Charging: Connect the provided USB-C to USB-C cable to the case's input port and a compatible power adapter (not included).
- Wireless Charging: Place the battery case (with or without the phone) on a Qi-compatible wireless charging pad. The LED display will indicate charging status.

Image: The battery case can be charged wirelessly by placing it on a compatible charging pad.
5.3. Charging Two Devices Simultaneously
The battery case features a USB-C output port, allowing you to charge a second device (e.g., another phone, earbuds, tablet) while your Samsung Galaxy S25 Ultra is in the case and being charged wirelessly or via its own USB-C port.
- Ensure the battery case has sufficient charge.
- Connect your second device to the USB-C output port on the battery case using a compatible cable.
- Activate charging on the battery case if necessary (one-click the power button).
Video: Illustrates how to charge two devices at once using the battery case's USB-C output port.
5.4. Data Sync & Android Auto
With your phone in the battery case, connect the case to your computer using a USB-C cable. This allows for seamless data transfer and Android Auto functionality without needing to remove your phone from the case.

Image: The battery case supports data synchronization when connected to a computer.
5.5. Wired & Wireless Headset Support
The case design ensures full access to your phone's ports, allowing you to use wired headphones. Additionally, the case does not interfere with Bluetooth connectivity, so you can continue to use your wireless earbuds.
Video: Demonstrates using wired headphones with the phone while it is in the battery case.
6. Maintenance
- Keep the battery case clean by wiping it with a soft, dry cloth.
- Avoid exposing the case to extreme temperatures, direct sunlight, or high humidity.
- Do not use harsh chemicals or abrasive cleaners on the case.
7. Troubleshooting
- Q: How to wirelessly charge a phone?
A: After installing the phone, press the button on the back once to turn on wireless charging. - Q: How to install and remove the battery case?
A: Bend the top edge and slowly push the phone in/out of the charger case. - Q: Can I still use the product after it's bumped or dropped?
A: No. Stop using it and take it to a local battery or electronics recycling center for proper disposal. - Q: Why did it suddenly stop working?
A: Please contact NEWDERY support and we'll sort it out pronto within 24h!
8. Specifications
| Brand | NEWDERY |
| Compatible Phone Models | for Samsung Galaxy S25 Ultra 6.9" |
| Model Number | N2010 |
| Battery Capacity | 10000mAh |
| Type-C Input | 5V/3A, 9V/2A Max (18W) |
| Type-C Output | 5V/3A, 9V/2.22A Max (20W) |
| Wireless Input | 5W/10W |
| Wireless Output | 5W/7.5W/10W |
| Material | Thermoplastic Polyurethane |
| Color | Black |
| Water Resistance Level | Not Water Resistant |
| Item Dimensions | 6.3 x 3.15 x 0.79 inches |
9. Safety Guidelines
- Use only with compatible devices (Samsung Galaxy S25 Ultra 6.9").
- Do not disassemble, crush, drop, or expose to fire or moisture.
- Keep away from extreme temperatures.
- If the product is damaged externally and shows swelling, leakage, or cracks, stop using it immediately.
- Keep out of reach of children.
10. Warranty & Support
NEWDERY provides a 12-month warranty for this product. We are committed to providing excellent customer service.
- 7*24H After-sales Service
- 30-Day Return Service
- 12-Months Replacement Promise
For any inquiries or support, please contact NEWDERY customer service.