Introduction
This user manual provides essential information for the safe and effective use of your onerbl AC/DC Adapter. This adapter is designed to be compatible with Tyrell Chenergy HH-974, HH974, and 24v-JP-H974 12V/24V Car Battery Jump Starters. Please read this manual thoroughly before using the product and retain it for future reference.
Safety Information
To prevent injury or damage to the product, observe the following safety precautions:
- Do not expose the adapter to rain, moisture, or extreme temperatures.
- Ensure the adapter is used in a well-ventilated area.
- Do not disassemble or modify the adapter. This may cause electric shock or fire.
- Keep the adapter away from children.
- Always unplug the adapter from the power outlet when not in use or before cleaning.
- Verify that the voltage and current ratings of your device match the adapter's output specifications.
- Avoid using the adapter if the cord or plug is damaged.
Product Overview
The onerbl AC/DC Adapter is designed to provide reliable power for compatible jump starters. It features a robust design with built-in safety mechanisms.
Key Features:
- Input: AC 100-240V 50/60Hz (Worldwide AC Input)
- Output: Compatible with 12V/24V systems
- Safety Protections: Over Voltage Protection, Over Heat Protection, Short-Circuit Protection, Over-Current Protection.
- Durable Design: Features copper wire and PVC jacket for longevity.

Figure 1: Front and side view of the onerbl AC/DC Adapter, showing the input specifications label.

Figure 2: Illustration of the smart chip's multiple protection features, including short-circuit, over-voltage, and over-current protection.

Figure 3: Detailed view of the adapter's durable design, highlighting the copper wire and PVC jacket for quality and longevity.
Setup
Follow these steps to set up your onerbl AC/DC Adapter:
- Inspect the Adapter: Before first use, visually inspect the adapter and its cable for any signs of damage. Do not use if damaged.
- Connect to Jump Starter: Plug the output connector of the AC/DC adapter into the designated charging port on your Tyrell Chenergy HH-974 (or compatible model) Car Battery Jump Starter. Ensure a secure connection.
- Connect to Power Outlet: Insert the AC plug of the adapter into a standard AC 100-240V wall outlet.
- Verify Connection: Confirm that the jump starter indicates it is receiving power or charging, if applicable (e.g., charging indicator light).

Figure 4: The onerbl AC/DC Adapter connected to a power strip, demonstrating a typical setup for charging.
Operating Instructions
Once the adapter is properly set up, it will begin to charge your compatible jump starter. The charging process is typically automatic.
- Allow the jump starter to charge until its internal battery indicator shows a full charge, or as recommended by the jump starter's own manual.
- Do not leave the jump starter connected to the adapter indefinitely after it is fully charged, unless the jump starter's manual specifies a float charge capability.
- When charging is complete, first unplug the adapter from the wall outlet, then disconnect it from the jump starter.
Maintenance
Proper maintenance ensures the longevity and safe operation of your adapter.
- Cleaning: Disconnect the adapter 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 adapter in a cool, dry place away from direct sunlight and moisture when not in use. Avoid tightly coiling the cable to prevent damage.
- Cable Care: Regularly check the power cord for cuts, fraying, or kinks. If any damage is observed, discontinue use immediately.
Troubleshooting
If you encounter issues with your onerbl AC/DC Adapter, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Adapter not providing power. | No power from outlet; loose connection; damaged adapter. | Check wall outlet with another device. Ensure all connections are secure. Inspect adapter for damage; replace if necessary. |
| Jump starter not charging. | Incorrect adapter; jump starter issue; adapter fault. | Confirm adapter compatibility with your jump starter model. Refer to the jump starter's manual. Test adapter with another compatible device if possible. |
| Adapter feels hot. | Normal operation; excessive load; poor ventilation. | A slight warmth is normal. Ensure adequate ventilation around the adapter. If excessively hot, disconnect immediately and contact support. |
If the problem persists after attempting these solutions, please contact customer support.
Specifications
Detailed technical specifications for the onerbl AC/DC Adapter:
| Specification | Value |
|---|---|
| Brand | onerbl |
| Input Voltage | AC 100-240V, 50/60Hz |
| Output Voltage | 12 Volts, 24 Volts (compatible) |
| Manufacturer | Shenzhen Waweis Technology Co., Ltd |
| ASIN | B0CTC5B7DS |

Figure 5: Illustration of extended cord design options, showing examples of 10 ft and 6.6 ft cable lengths. The specific cable length for this model is 76 inches (approximately 6.33 ft).

Figure 6: Physical dimensions of the adapter: 2.6 inches (length), 1.6 inches (width), 1.2 inches (height), and a cable length of 76 inches.
Warranty and Support
This product is covered by a standard return policy. For specific warranty details or technical support, please refer to the purchase platform or contact the seller directly. Ensure you have your purchase information readily available.
Seller: GreatComputerParts
ASIN: B0CTC5B7DS