1. Product Overview
The Retevis RT21 H-777S Six-Way Charger is designed for efficient and rapid charging of multiple walkie-talkies and their batteries simultaneously. This multi-unit rapid gang charger is compatible with Retevis RT21, H-777S, RT21V, RT28, and RT53 two-way radios. It features advanced safety protections and a user-friendly design for convenient operation.

Image 1.1: The Retevis six-way charger shown with compatible walkie-talkies inserted into the charging bays. This image illustrates the product's primary function and compatibility with various Retevis models, specifically noting it is not for H-777.
Key features include the ability to charge six devices at once, multiple safety protections (overcharge, overvoltage, short circuit), a power switch on the base for control, and charging indicators for each bay. The charger supports a 100-240V power supply for international use, with a detachable adapter and pin for local compatibility.

Image 1.2: An angled view of the Retevis six-way charger, highlighting its compact design and multiple charging slots. This image emphasizes the convenience and safety features of the unit.
2. Setup Guide
Follow these steps to set up your Retevis Six-Way Charger:
- Unpack the Charger: Carefully remove the charger unit and power adapter from its packaging.
- Connect the Power Adapter: Insert the DC plug of the power adapter into the DC jack located on the side of the charger unit.

Image 2.1: The power adapter for the Retevis six-way charger, showing the AC plug and the DC output cable with its connector. This component supplies power to the charging unit.
- Plug into Power Outlet: Plug the power adapter into a standard 100-240V AC wall outlet.
- Activate Power: Locate the power switch on the side of the charger unit and switch it to the 'ON' position.

Image 2.2: A close-up view of the power switch and DC jack on the side of the charger. The power switch controls the charging process, and the DC jack is where the power adapter connects.
3. Operating Instructions
To charge your walkie-talkies or batteries:
- Insert Radios/Batteries: Carefully place the compatible walkie-talkies (with or without batteries attached) or standalone batteries into the individual charging bays. Ensure proper alignment with the charging contacts.

Image 3.1: The six-way charger with a combination of walkie-talkies and standalone batteries inserted into the charging bays. This demonstrates the flexibility of charging options.

Image 3.2: A detailed view of the individual charging bays, showing the contacts and alignment tabs. Proper placement is crucial for initiating the charging process.
- Monitor Charging Indicators: Each charging bay has an indicator light. Typically, a red light indicates charging in progress, and a green light indicates a full charge. Refer to the specific radio's manual for exact indicator light behavior if different.
- Remove When Charged: Once the indicator light turns green, the device is fully charged and can be removed from the bay.

Image 3.3: The six-way charger actively charging multiple radios, indicated by the illuminated charging lights. This image demonstrates the charger in its functional state.
4. Maintenance
To ensure the longevity and optimal performance of your charger:
- Cleaning: Disconnect the charger from the power outlet before cleaning. Use a soft, dry cloth to wipe the exterior. Avoid using liquid cleaners or abrasive materials.
- Storage: Store the charger in a cool, dry place away from direct sunlight and extreme temperatures when not in use.
- Inspect Cables: Periodically check the power adapter cable for any signs of damage. Do not use if the cable is frayed or damaged.
5. Troubleshooting
If you encounter issues with your charger, refer to the following common problems and solutions:
- No Power/No Indicator Lights:
- Ensure the power adapter is securely plugged into both the charger and the wall outlet.
- Verify the power switch on the charger is in the 'ON' position.
- Check if the wall outlet is functional by plugging in another device.
- Device Not Charging (No Red Light):
- Ensure the walkie-talkie or battery is correctly seated in the charging bay, making full contact with the charging pins.
- Confirm that the device is compatible with this charger model (RT21, H-777S, RT21V, RT28, RT53).
- Try inserting the device into a different bay to determine if the issue is with the bay or the device.
- Some Bays Not Charging:
- Inspect the specific non-functional bay for any obstructions or damage to the charging contacts.
- Ensure the radio or battery is properly aligned with the alignment tabs in the bay.
- Slow Charging:
- Ensure you are using the original Retevis power adapter provided with the charger.
- Verify that the ambient temperature is within the recommended operating range for charging.
6. Product Specifications

Image 6.1: The Retevis six-way charger with its dimensions clearly marked in both centimeters and inches. This provides a visual reference for the physical size of the unit.
| Feature | Detail |
|---|---|
| Brand | Retevis |
| Model Number | FC9059B |
| Color | Black |
| Product Dimensions (D x W x H) | 2.36"D x 7.87"W x 9.84"H |
| Item Weight | 2.5 Pounds |
| Input Voltage | 100-240 Volts |
| Output Voltage | 4.2 Volts |
| Current Rating | 0.5 Amps (per bay) |
| Specification Met | RoHS |
| Compatibility | Retevis RT21, H-777S, RT21V, RT28, RT53 Walkie Talkies and Batteries |
7. Warranty and Support
Warranty Information:
Retevis provides a 1-year warranty for accessories and a 30-day no-reason return policy. Beyond the warranty period, maintenance services are still offered, with buyers responsible for associated costs.
Customer Support:
For any inquiries, technical assistance, or warranty claims, please contact Retevis customer service through Amazon. Responses are typically provided within 12 hours. The product is sold by Retevis Direct and fulfilled by Amazon.