1. Introduction
Thank you for choosing the ACEFAST MagSafe Mobile Battery M8. This ultra-slim and lightweight portable charger is designed for convenience and efficiency, offering both MagSafe wireless charging and PD18W wired fast charging. Its compact design makes it ideal for daily use, travel, and business trips. This manual provides essential information on how to use and maintain your device safely and effectively.

Image: The ACEFAST M8 mobile battery magnetically attached to the back of a smartphone, showcasing its compact and integrated design.
Key Features:
- Ultra-Slim & Lightweight Design: At just 8.3mm thin and 105g, it's designed to be as portable as a card.
- Dual Charging Modes: Supports MagSafe wireless charging (up to 7.5W) and Type-C PD18W wired fast charging.
- Simultaneous Charging: Capable of charging two devices concurrently.
- Advanced Temperature Control: Equipped with an AI control chip and dual NTC temperature sensors for real-time monitoring and heat suppression.
- High Safety Standards: PSE certified and UN38.3 compliant for safe air travel.
- 5000mAh Capacity: Provides sufficient power for daily needs, offering approximately 1.3 charges for an iPhone 15 Pro or 1 charge for an iPhone 16 Pro Max.

Image: A visual comparison highlighting the ACEFAST M8's ultra-thin 8.3mm profile against a thicker, conventional power bank, emphasizing its superior portability and heat dissipation.
2. Setup
Charging the Mobile Battery:
- Connect the included USB-C charging cable to the Type-C port on the ACEFAST M8.
- Connect the other end of the cable to a compatible USB power adapter (not included).
- The LED indicator lights on the side of the power bank will illuminate to show the charging status. When all four LEDs are solid, the battery is fully charged.
It is recommended to fully charge the mobile battery before its first use.
3. Operating Instructions
MagSafe Wireless Charging:
For MagSafe-compatible devices (e.g., iPhone 12-16 series), simply align the ACEFAST M8 with the back of your device. The strong magnetic attraction (13N) will securely attach the power bank, and wireless charging will begin automatically. Ensure there are no foreign objects between the power bank and your device that could interfere with the magnetic connection or charging.

Image: A visual representation of the ACEFAST M8's strong 13N magnetic absorption, showing it securely attached to a smartphone, ensuring stable wireless charging even when shaken.
Wired Fast Charging:
Connect your device to the Type-C port on the ACEFAST M8 using a compatible charging cable. The power bank supports PD18W fast charging, allowing for rapid power delivery to your smartphone, tablet, or other compatible devices. For example, an iPhone 16 Pro can be charged to approximately 50% in just 35 minutes.

Image: An illustration demonstrating the ACEFAST M8's 18W fast charging capability, highlighting its efficiency in quickly charging devices.
Simultaneous Charging:
The ACEFAST M8 allows you to charge two devices at the same time. You can use MagSafe wireless charging for one device and the Type-C port for wired charging of another device simultaneously. The built-in AI chip intelligently distributes power to optimize charging for both devices.

Image: A depiction of the ACEFAST M8 simultaneously charging two devices, one wirelessly via MagSafe and another via a USB-C cable, illustrating its versatility.
LED Indicator:
The LED lights on the side of the power bank indicate the remaining battery level and charging status. Refer to the following table:
| LED Status | Meaning |
|---|---|
| All LEDs solid | Fully charged |
| Flashing LEDs | Charging in progress |
| Number of solid LEDs | Remaining battery capacity (e.g., 1 LED = 0-25%, 4 LEDs = 75-100%) |
4. Maintenance
To ensure the longevity and optimal performance of your ACEFAST M8 mobile battery, follow these maintenance guidelines:
- Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures.
- Cleaning: Use a soft, dry cloth to clean the surface of the power bank. Do not use harsh chemicals or abrasive materials.
- Battery Health: The ACEFAST M8 features an AI control chip and dual NTC temperature sensors that monitor internal temperature 40 times per second (3 million times a day) to prevent overheating and extend battery life. Even after 300 charge cycles, the battery retains over 80% of its capacity.
- Avoid Drops: While durable, avoid dropping the device or subjecting it to strong impacts.
- Water Exposure: Keep the device away from water and high humidity.

Image: A detailed graphic illustrating the ACEFAST M8's AI temperature management system and dual NTC sensors, which actively control heat during charging to ensure safety and prolong battery life.
5. Troubleshooting
If you encounter any issues with your ACEFAST M8 mobile battery, please refer to the following common problems and solutions:
- Device not charging:
- Ensure the mobile battery itself is charged.
- Check if the charging cable is securely connected to both the power bank and your device.
- For wireless charging, ensure your device is MagSafe compatible and properly aligned with the power bank. Remove any thick cases that might interfere.
- Try a different charging cable or power adapter.
- Slow charging:
- Ensure you are using a PD-compatible adapter for fast wired charging.
- For wireless charging, ensure optimal alignment.
- High ambient temperatures can affect charging speed.
- Power bank not turning on/LEDs not lighting up:
- The battery might be completely depleted. Connect it to a power source and allow it to charge for a few minutes.
- Overheating during use:
- The ACEFAST M8 is designed with advanced temperature control to prevent overheating. If the device feels excessively hot, disconnect it immediately and allow it to cool down. If the issue persists, contact customer support.
If the problem persists after trying these solutions, please contact ACEFAST customer support for assistance.
6. Specifications
| Feature | Detail |
|---|---|
| Model Number | M8 |
| Product Weight | 180 g |
| Package Dimensions | 14.4 x 10.3 x 2.8 cm |
| Color | Black |
| Battery Capacity | 5000mAh |
| Wired Output | PD18W (Type-C) |
| Wireless Output | Max 7.5W (MagSafe compatible) |
| Special Features | LED indicator, Slim design, Wireless charging, Short circuit protection, Fast charging, AI temperature control |
| Box Contents | USB-C charging cable (0.3m), Mobile battery unit, Instruction manual |
| Certifications | PSE, UN38.3 |
| Country of Origin | China |
7. Safety Information & Certifications
The ACEFAST M8 mobile battery is designed with multiple safety features and complies with international standards to ensure safe operation.
- PSE Certification: This product has obtained PSE (Product Safety Electrical Appliance and Material) certification, meeting Japan's technical standards for electrical product safety.
- UN38.3 Compliance: The battery adheres to the UN38.3 lithium battery safety standard set by the International Air Transport Association (IATA), making it safe for carry-on during domestic and international flights.
- Multi-Protection System: Features include over-charge protection, over-discharge protection, over-current protection, short-circuit protection, and AI temperature control to prevent various risks.

Image: A graphic highlighting the ACEFAST M8's 5000mAh capacity and comprehensive safety features, including PSE and UN38.3 compliance, AI temperature management, and protection against overcharging and overheating.
8. Warranty and Support
ACEFAST is committed to providing high-quality products and excellent customer service.
- 18-Month Manufacturer's Warranty: Your ACEFAST M8 mobile battery comes with an 18-month manufacturer's warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use.
- Japanese Customer Support: For any inquiries, technical support, or warranty claims, please contact our dedicated Japanese customer support team. We are available 24 hours a day, 365 days a year, to provide prompt and courteous assistance.
- Easy Exchange Policy: In case of initial defects or malfunctions under normal use, we offer a hassle-free exchange for a new product without requiring a return of the original item.
For support, please refer to the contact information provided in the product packaging or on the official ACEFAST website.

Image: A graphic detailing ACEFAST's customer support commitment, including an 18-month long-term warranty, hassle-free exchange policy for defects, PSE certification, and 24/7 Japanese customer support.





