1. Product Overview
The KUULAA Mini Power Bank is a compact and lightweight portable charger designed for on-the-go power. It features a digital display to show the remaining battery percentage and supports fast charging for compatible devices.

Key Features:
- Compact Design: Small and delicate, easily fits in a pocket or bag.
- Fast Charging: Supports 20W PD & 18W QC charging.
- Digital Display: Clear LED display shows the current power level.
- Broad Compatibility: Available in Type-C and Lightning versions for a wide range of smartphones.
- Travel-Friendly: Plane allowed for carry-on bags.
- Case-Friendly: Compatible with phone cases less than 4mm thick.
2. Specifications
| Attribute | Detail |
|---|---|
| Brand Name | KUULAA |
| Model | KL-YD42-C2 |
| Battery Type | Li-Polymer Battery |
| Capacity | 5000mAh (3.7V/18.5Wh) |
| Rated Capacity | 3000mAh |
| Max Output | 20W |
| Shell Material | Plastic |
| Features | Digital Display, With Plug |
| Quick Charge Technology | Two-way Quick Charge |
| Input Interface | USB Type C (5V=3A, 9V=2.22A, 12V=1.5A) |
| Output Interface (Lightning Version) | LIGHTNING (20W), USB-Type C (20W) |
| Output Interface (Type-C Version) | USB-Type C (18W), USB-Type C (20W) |
| Dimensions | 81mm x 28mm x 50mm |
| Weight | Approximately 0.2 lb (90g) |
| Package Weight | 0.2 kg |
| Package Dimensions | 10cm x 10cm x 5cm |


3. Package Contents
Please check the package for the following items:
- KUULAA Mini Power Bank
- USB-C Charging Cable
- User Manual

4. Setup and First Use
Charging the Power Bank:
- Before first use, fully charge the power bank.
- Connect the provided USB-C charging cable to the power bank's USB-C input port.
- Connect the other end of the cable to a compatible power adapter (10W or higher recommended for faster charging).
- The LED display will show the charging progress. It typically takes 1-2 hours to fully charge the power bank with a suitable adapter.
Checking Battery Level:
Press the power button once to activate the LED display, which will show the current battery percentage.
5. Operating Instructions
Charging Your Device:
- Identify the correct version of your power bank (Type-C or Lightning).
- For the Lightning version, plug the integrated Lightning connector directly into your iPhone's charging port.
- For the Type-C version, plug the integrated Type-C connector directly into your Android phone's charging port.
- The power bank will automatically begin charging your device, and the LED display will show its remaining power.
- To stop charging, simply unplug the power bank from your device.


Fast Charging Performance:
The power bank supports 20W PD and 18W QC charging, allowing for rapid power delivery to compatible devices. For example, a 20W PD charger can charge a phone to 40% in approximately 30 minutes, significantly faster than a standard 5V/1A charger.

LED Display:
The integrated LED display provides a real-time percentage of the power bank's remaining charge, eliminating guesswork.

Video Demonstration:
Watch a demonstration of the KUULAA Mini Power Bank in various usage scenarios, highlighting its convenience and fast charging capabilities.
6. Maintenance
- Keep the power bank dry and away from moisture.
- Avoid exposing the device to extreme temperatures (hot or cold).
- Clean the device with a soft, dry cloth. Do not use harsh chemicals or abrasive materials.
- Store the power bank in a cool, dry place when not in use.
- Do not disassemble or attempt to repair the power bank yourself.
7. Troubleshooting
Device Not Charging:
- Ensure the power bank itself is charged. Check the LED display.
- Verify that the power bank's connector is fully and correctly inserted into your phone's charging port.
- Check for any debris in the charging ports of both the power bank and your phone.
- Ensure your phone case is not obstructing the connection. The power bank is compatible with cases less than 4mm thick.

Slow Charging:
- Ensure both the power bank and your device support fast charging protocols (PD/QC).
- Using your phone while charging can slow down the charging process.
- The charging cable used to charge the power bank should be of good quality and support fast charging.
Compatibility Issues:
- This power bank comes in two main versions: Lightning (for iPhones) and Type-C (for Android phones like Samsung, Xiaomi, Huawei, Google Pixel, Motorola, OnePlus, etc.). Ensure you have the correct version for your device.
- For iPhone users, ensure your iPhone model is compatible with the Lightning connector. For example, iPhone 15 and newer models use USB-C, so the Type-C version of this power bank would be needed.
8. User Tips
- Monitor Charge Level: Always keep an eye on the power bank's LED display to know its remaining charge, especially before heading out.
- Portability: Its small size and lack of wires make it ideal for charging your phone on the go without being tethered to a wall outlet.
- Efficient Charging: The power bank can efficiently charge your phone, even while the phone is in active use.
- Air Travel: This power bank is allowed in carry-on bags for air travel, but not in checked luggage.

9. Warranty and Support
This product is covered by a warranty against defects in materials and workmanship for a period of 12 months from the date of purchase. The warranty does not cover damage caused by human factors, misuse of the product, unauthorized disassembly, or damage during transportation.
For further assistance or to view additional item guides and documents, please refer to the official product page or contact customer support.