1. Introduction
This manual provides essential instructions for the safe and efficient use of your KONKIN BOO 42V AC Adapter Charger, model 20240805-QY1-261. This charger is specifically designed for Ancheer 26 Inch Wheel 350W Electric Mountain Bikes equipped with a 36V 10.4Ah Lithium-ion Battery. Please read this manual thoroughly before using the charger to ensure proper operation and to prevent damage to the product or injury.
The KONKIN BOO charger is engineered for high performance and stable output, ensuring reliable power delivery to your e-bike battery.

The charger is designed for low power loss and high efficiency during the charging process.

Illustrates the charger's high performance, durability, and stable output.
2. Safety Information
Your safety is paramount. This charger incorporates several built-in safety features to protect both the device and the user. Always adhere to the following safety guidelines:
- Indoor Use Only: Do not expose the charger to rain, moisture, or extreme temperatures.
- Proper Ventilation: Ensure the charger is placed in a well-ventilated area during use to prevent overheating.
- Avoid Damage: Do not use the charger if the cable or housing is damaged. Contact support for a replacement.
- Correct Voltage: This charger is designed for AC 100-240V input. Ensure your power outlet matches this requirement.
- Unplug When Not In Use: Disconnect the charger from the power outlet and the e-bike battery when not actively charging.
- Children and Pets: Keep the charger out of reach of children and pets.
The charger features multiple protections:
- Over Voltage Protection: Safeguards against excessive voltage input.
- Over Current Protection: Prevents damage from excessive current flow.
- Over Temperature Protection: Automatically shuts down if the charger's internal temperature exceeds safe limits.
- Short Circuit Protection: Protects against short circuits in the charging circuit.

Visual representation of the charger's integrated safety mechanisms.
Proposition 65 Warning: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
3. Setup
Follow these steps to set up your charger for the first time:
- Unpack: Carefully remove the charger from its packaging. Inspect it for any visible damage.
- Placement: Place the charger on a stable, flat, and dry surface, away from direct sunlight, heat sources, and flammable materials. Ensure adequate ventilation around the unit.
- Connect to Power: Plug the AC power cord into a standard AC 100-240V electrical outlet.
- Connect to E-bike: Locate the charging port on your Ancheer 26 Inch Wheel 350W Electric Mountain Bike (36V 10.4Ah Lithium-ion Battery). Insert the round tip connector of the charger firmly into the bike's charging port.
Ensure all connections are secure before proceeding to operation.
4. Operating Instructions
Once the charger is properly set up, follow these steps to charge your e-bike battery:
- Initiate Charging: After connecting the charger to both the power outlet and the e-bike battery, the charging process will begin automatically.
- Charging Indicator: Observe the indicator light on the charger (if present). Typically, a red light indicates charging in progress, and a green light indicates a full charge or standby mode. Refer to your e-bike's manual for specific battery indicator behavior.
- Charging Time: Charging time will vary depending on the battery's current charge level and capacity. Avoid overcharging by disconnecting the charger once the battery is fully charged.
- Disconnect: Once charging is complete (indicated by the charger or bike's battery indicator), first unplug the charger from the e-bike's charging port, then unplug the AC power cord from the wall outlet.
Do not leave the charger connected indefinitely after the battery is fully charged.
5. Maintenance
Proper maintenance ensures the longevity and safe operation of your charger:
- Cleaning: Disconnect the charger from all power sources before cleaning. Use a soft, dry cloth to wipe the exterior. Do not use liquid cleaners or solvents.
- Storage: Store the charger in a cool, dry place when not in use. Avoid extreme temperatures and high humidity.
- Cable Inspection: Regularly inspect the power cord and connector for any signs of wear, cuts, or damage. If any damage is found, discontinue use immediately and replace the charger.
- Ventilation: Ensure the charger's ventilation openings remain clear of dust and debris.
6. Troubleshooting
If you encounter issues with your charger, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Charger not working / No indicator light | No power from outlet; Loose connection; Damaged charger. | Check power outlet with another device; Ensure all connections are secure; Inspect charger for damage. If damaged, discontinue use. |
| Battery not charging | Incorrect connection; Battery issue; Charger fault. | Verify the charger is correctly plugged into the e-bike; Consult your e-bike manual for battery troubleshooting; If the charger is suspected faulty, contact support. |
| Charger is hot during use | Normal operation; Poor ventilation; Overload. | A slight warmth is normal. Ensure adequate ventilation around the charger. If it becomes excessively hot, disconnect immediately and contact support. |
If the problem persists after attempting these solutions, please contact KONKIN BOO customer support.
7. Specifications
- Model Number: 20240805-QY1-261
- Brand: KONKIN BOO
- Input Voltage: AC 100-240V
- Output Voltage: 42V
- Connector Type: Round Tip
- Color: Black
- Power Source: Corded Electric
- Compatible Devices: Ancheer 26 Inch Wheel 350W Electric Mountain Bike (36V 10.4Ah Lithium-ion Battery)
- Special Feature: Over Voltage Protection, Over Heat Protection, Short Circuit Protection, Over Current Protection
8. Warranty and Support
For warranty information, please refer to the documentation included with your purchase or visit the official KONKIN BOO website. Warranty terms and conditions may vary.
If you require technical assistance, have questions about your charger, or need to report a defect, please contact KONKIN BOO customer support through the retailer where the product was purchased or via the manufacturer's official contact channels.
Manufacturer: KONKIN BOO





