1. Introduction and Key Features
The LISEN 0.3'' Ultra Slim MagSafe Portable Charger (Model 2E421) is a compact and lightweight 5,000mAh wireless power bank designed for seamless charging of iPhone 12-16 series (including Pro/Max/non-Pro models). Its ultra-slim profile, measuring only 0.3 inches thin and weighing under 3oz, makes it highly portable and convenient for daily use, travel, and commuting.
Crafted from aircraft-grade aluminum alloy, this charger offers enhanced durability, resisting scratches, dents, and drops from up to 3ft. LISEN prioritizes safety, with each unit undergoing over 12 quality checks, including protection against overcharge, overheat, and short-circuits, and holding FCC/CE/RoHS certifications.
Key Features:
- Ultra-Slim Design: Only 0.3 inches thin and under 3oz, making it highly portable.
- MagSafe Compatibility: Designed for iPhone 12-16 models (12/13/14/15/16, Pro/Max/non-Pro).
- 5,000mAh Battery Capacity: Provides reliable power on the go.
- Durable Construction: Made from aircraft-grade aluminum alloy for enhanced resistance to damage.
- Advanced Safety Features: Includes overcharge, overheat, and short-circuit protection.
- USB-C In/Out Port: Allows for charging the power bank and charging other devices via cable.
- LED Power Indicators: Displays remaining battery level.
2. Setup and Charging the Power Bank
Charging the LISEN Power Bank:
- Locate the USB-C In/Out port on the side of the power bank.
- Connect the provided USB-C to USB-C cable to the power bank's USB-C port.
- Connect the other end of the USB-C cable to a compatible USB-C power adapter (not included).
- The LED indicators on the power bank will illuminate to show the charging status. A full charge typically takes 2-3 hours.

Initial Setup:
Before first use, fully charge your LISEN power bank to ensure optimal performance.
3. Operating Instructions
Wireless Charging (MagSafe Compatible iPhones):
- Ensure your iPhone is MagSafe compatible (iPhone 12 series or newer). For optimal magnetic attachment, use a MagSafe-compatible case.
- Align the LISEN power bank with the back of your iPhone. The magnetic connection will snap it into place.
- The power bank will automatically begin charging your iPhone. The LED indicators on the power bank will show its remaining charge, and your iPhone will display its charging status.
Wired Charging (USB-C Output):
- Connect a USB-C cable (not included, unless charging the power bank itself) to the USB-C In/Out port on the power bank.
- Connect the other end of the cable to your device (e.g., Android phone, tablet, or other USB-C powered accessories).
- The power bank will begin charging the connected device.
LED Indicators:
- The LED lights on the power bank indicate the remaining battery capacity.
- During charging, the LEDs will flash to show progress.
- When fully charged, all LEDs will remain solid.
Low Power Charge Mode:
To activate low power charge mode (for smaller devices or to extend charging duration), press and hold the power button for 2 seconds. The LED indicators will light up in an up-and-down pattern. In this mode, the power bank will stop charging the device after 2 hours. To return to normal charge mode, press and hold the power button for 2 seconds again; the LEDs will stay lit.
4. Maintenance
- Keep the power bank dry and away from moisture.
- Avoid exposing the device to extreme temperatures (hot or cold).
- Clean the surface with a soft, dry cloth. Do not use harsh chemicals or abrasive materials.
- Store in a cool, dry place when not in use.
- Avoid dropping or subjecting the power bank to strong impacts.
5. Troubleshooting
Device not charging wirelessly:
- Ensure your iPhone is MagSafe compatible (iPhone 12 series or newer).
- Check if your phone case is MagSafe compatible. Thick or non-MagSafe cases may prevent proper magnetic connection and charging.
- Verify the power bank has sufficient charge (check LED indicators).
- Ensure the power bank is properly aligned with your iPhone's MagSafe area.
Slow charging:
- Wireless charging is generally slower than wired charging.
- Charging speed may decrease when the power bank's battery level is low (below 75%).
- Ensure the power bank is not in Low Power Charge Mode.
Power bank getting warm during use:
- It is normal for the power bank to become slightly warm during charging.
- The device includes overheat protection to prevent excessive temperatures. If it becomes excessively hot, discontinue use and contact support.
Power bank not charging:
- Ensure the USB-C cable is securely connected to both the power bank and the power adapter.
- Try using a different USB-C cable and/or power adapter.
6. Specifications
| Feature | Detail |
|---|---|
| Product Dimensions | 4.1 x 2 x 0.34 inches |
| Item Weight | 5.9 ounces |
| Item Model Number | 2E421 |
| Special Features | Digital Display, Fast Charging, Pocket Size, Slim, Wireless Charging |
| Other Display Features | Wireless |
| Color | Grey |
| Manufacturer | LISEN |
| Date First Available | August 26, 2024 |
| Connector Type | USB Type C |
| Battery Capacity | 5000 Milliamp Hours |
7. Warranty and Support
Warranty:
This LISEN product comes with a 24-month worry-free warranty from the date of purchase. Please retain your proof of purchase for warranty claims.
Customer Support:
For any questions, technical assistance, or warranty claims, please contact LISEN customer support. Our 7*24H professional support and After-Service Team are ready to assist you.
Contact information can typically be found on the product packaging or the official LISEN website.





