Introduction
This manual provides essential instructions for the safe and effective use of your onerbl 4.2V AC/DC Adapter. This adapter is designed to provide reliable power for charging compatible Mobile Warming Li-Ion battery packs, specifically models ASA16U08 and MW-370 (3.7V, 2200mAh, 8.14Wh). Please read this manual thoroughly before use and retain it for future reference.
Safety Information
Your onerbl AC/DC adapter incorporates advanced safety features to protect your devices and ensure safe operation. These include:
- Short-Circuit Protection: Prevents damage from electrical shorts.
- Over-Voltage Protection: Safeguards against excessive voltage input.
- Over-Current Protection: Protects against excessive current flow.
Always ensure the adapter is used in a well-ventilated area and avoid covering it during operation. Do not expose the adapter to moisture or extreme temperatures.

Setup and Connection
Follow these steps to set up and connect your onerbl AC/DC adapter:
- Inspect the Adapter: Before use, visually inspect the adapter and its cables for any signs of damage. Do not use if damaged.
- Connect to Battery Pack: Plug the DC output connector of the adapter into the charging port of your compatible Mobile Warming ASA16U08 or MW-370 battery pack. Ensure a secure connection.
- Connect to Power Outlet: Insert the AC input plug of the adapter into a standard AC 100-240V 50/60Hz wall outlet.
- Verify Charging: The battery pack should indicate that it is charging (refer to your battery pack's manual for specific charging indicators).


Operating Instructions
Once connected, the adapter will automatically begin charging your compatible battery pack. The adapter is designed for continuous operation during the charging cycle. Always ensure the battery pack is fully charged before disconnecting, or disconnect when charging is complete according to your battery pack's instructions.
Maintenance
To ensure the longevity and optimal performance of your adapter:
- Cleaning: Disconnect the adapter from the power outlet and the battery pack before cleaning. Use a soft, dry cloth to wipe the exterior. Do not use liquid cleaners or solvents.
- Storage: Store the adapter in a cool, dry place away from direct sunlight and moisture when not in use. Avoid tightly coiling the cable.
- Cable Care: Do not bend, twist, or pull the cable excessively. Avoid placing heavy objects on the cable.

Troubleshooting
If you encounter issues with your adapter, please refer to the following common solutions:
- Adapter Not Charging:
- Ensure the adapter is securely plugged into a working wall outlet.
- Verify that the DC connector is firmly inserted into the battery pack's charging port.
- Check if the wall outlet is functional by plugging in another device.
- Confirm that your battery pack is compatible with a 4.2V DC input.
- Adapter Overheating:
- Disconnect the adapter immediately.
- Ensure the adapter is in a well-ventilated area and not covered.
- If overheating persists, discontinue use and contact support.
If these steps do not resolve the issue, please contact customer support.
Specifications
| Feature | Detail |
|---|---|
| Brand | onerbl |
| Input Voltage | AC 100-240V, 50/60Hz |
| Output Voltage | DC 4.2V |
| Compatibility | Mobile Warming ASA16U08, MW-370 (3.7V 2200mAh 8.14Wh Li-Ion Battery Packs) |
| Connector Type | AC, Power Cord (DC output connector specific to compatible battery packs) |
| Color | Black |
| Form Factor | Compact |
| Safety Features | Over Voltage Protection, Over Heat Protection, Short-Circuit Protection, Over-Current Protection |
Warranty and Support
This product is covered by a standard manufacturer's warranty. For specific warranty details, returns, or technical support, please refer to the retailer's policy or contact the manufacturer directly. Please have your purchase information and product model (ASA16U08) available when contacting support.