CS BATTERY NNTN8359
CS BATTERY Replacement Lithium-Ion Battery User Manual
For Motorola DP4000ex, DP4401ex, DP4801ex ATEX Series Radios
Models: NNTN8359, NNTN8359A, NNTN8359C
1. Introduction
This manual provides essential information for the safe and effective use of your CS BATTERY replacement lithium-ion battery. This battery is designed to be a high-capacity, reliable power source for compatible Motorola ATEX series two-way radios.
Product Compatibility:
- Motorola DP4000ex
- Motorola DP4401ex ATEX
- Motorola DP4801ex ATEX
Please read this manual thoroughly before installation and operation.

Image 1.1: Eight CS BATTERY replacement lithium-ion batteries.
2. Safety Information
WARNING: Failure to follow these safety instructions can result in fire, electric shock, injury, or damage to the battery or radio.
- Do not disassemble, short-circuit terminals, or dispose of the battery in fire.
- Use only with a compatible NNTN8359 charger. Using an incompatible charger may damage the battery and pose a safety risk.
- Charging Temperature: Charge the battery only within the temperature range of 0°C to 45°C (32°F to 113°F).
- Operating Temperature: Do not expose the battery to extreme temperatures outside its specified operating range.
- Hazardous Atmospheres: Do not replace the battery in a hazardous atmosphere. This battery is designed for ATEX-certified radios; ensure proper handling in such environments.
- Keep the battery away from water, moisture, and excessive heat.
- If the battery appears damaged, swollen, or leaks, discontinue use immediately and dispose of it properly.
- Keep out of reach of children.

Image 2.1: Battery bottom view with safety warnings and belt clip.
3. Setup and Installation
Follow these steps to properly install the replacement battery into your Motorola two-way radio.
- Power Off Radio: Ensure your Motorola two-way radio is completely powered off before attempting to remove or install the battery.
- Remove Old Battery (if applicable): Locate the battery release latch on your radio (typically on the bottom or side of the battery compartment). Press the latch and slide the old battery away from the radio body.
- Align New Battery: Take the CS BATTERY replacement battery. Align the battery's grooves with the corresponding rails on the back of your radio.
- Slide and Secure: Gently slide the battery into place until you hear a click, indicating that the battery release latch has engaged and the battery is securely locked.
- Verify Connection: Lightly tug on the battery to ensure it is firmly attached and does not wobble.

Image 3.1: Top view of the replacement battery, showing contacts.

Image 3.2: Angled view of the battery, showing connection points.
4. Operating Instructions
This section covers charging and general usage of your new battery.
4.1. Initial Charging
For optimal performance, it is recommended to fully charge the battery before its first use. This helps to calibrate the battery's charge indicator and maximize its lifespan.
- Ensure the battery is securely installed in your radio or placed in a compatible NNTN8359 desktop charger.
- Connect the charger to a power source.
- Observe the charger's indicator light. It will typically show a specific color (e.g., red) during charging and change to another color (e.g., green) when charging is complete.
- Allow the battery to charge until the indicator shows a full charge.
4.2. General Usage
- The battery is a lithium-ion type and does not suffer from memory effect, meaning you can charge it at any time without needing to fully discharge it first.
- If your radio's operating time significantly decreases, it indicates that the battery may need to be recharged or is nearing the end of its lifespan.
- Always ensure the battery contacts on both the battery and the radio are clean and free of debris for reliable connection.
5. Maintenance
Proper maintenance can extend the life and performance of your battery.
- Cleaning: Periodically clean the battery contacts with a clean, dry cloth to ensure good electrical connection. Do not use abrasive cleaners or solvents.
- Storage: If storing the battery for an extended period, charge it to approximately 50% capacity and store it in a cool, dry place (ideally between 10°C and 25°C or 50°F and 77°F). Avoid extreme temperatures.
- Avoid Deep Discharge: While lithium-ion batteries are resilient, consistently running them to 0% charge can reduce their overall lifespan.
- Disposal: Do not dispose of batteries in household waste. Follow local regulations for proper recycling of lithium-ion batteries.
6. Troubleshooting
If you encounter issues with your battery, refer to the following common problems and solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Battery not charging | Incorrect charger used; dirty contacts; charger malfunction; battery fault. | Ensure you are using a compatible NNTN8359 charger. Clean battery and charger contacts. Test with another known-good charger if available. If problem persists, the battery may be faulty. |
| Short operating time | Battery not fully charged; battery nearing end of life; high power consumption by radio. | Ensure battery is fully charged. If the battery is old, consider replacement. Reduce radio's power output if possible. |
| Battery not fitting securely | Incorrect battery model; improper installation. | Verify the battery model matches your radio. Re-install the battery, ensuring it clicks into place. |
If troubleshooting steps do not resolve the issue, please contact customer support.
7. Specifications
Detailed technical specifications for the CS BATTERY replacement battery.
- Battery Type: Lithium-Ion (Li-ion)
- Capacity: 2000 mAh
- Voltage: 7.4 V
- Energy Rating: 14.80 Wh
- Compatible Models: Motorola DP4000ex, DP4401ex ATEX, DP4801ex ATEX
- Compatible Part Numbers: NNTN8359, NNTN8359A, NNTN8359C
- Certifications: ROSH, CE, UL
- Product Dimensions: Approximately 2.76 x 2.64 x 1.34 inches (70.36 x 67.88 x 34.52 mm)
- Item Weight: Approximately 1.12 pounds (0.51 kg)
8. Warranty and Support
CS BATTERY products are manufactured with quality and reliability in mind. This battery is designed to meet or exceed the specifications of the original equipment manufacturer.
For any questions, technical assistance, or support inquiries, please contact the manufacturer directly. When contacting support, please provide your battery details or pictures for professional assistance.
Manufacturer: CS BATTERY
Support Contact: Please refer to your purchase documentation or the seller's contact information for direct support channels. The manufacturer aims to reply within 24 hours for inquiries.
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