1. Introduction
This manual provides essential information for the safe and effective use of your Motorola IMPRES NTN9858C NiMH battery. The NTN9858C is a 7.2V Nickel-Metal Hydride (NiMH) battery with a capacity of 2410 mAh, designed for use with compatible Motorola two-way radios. IMPRES technology optimizes battery life and provides advanced charging capabilities when used with an IMPRES charger.

Figure 1: Front view of the Motorola IMPRES NTN9858C NiMH battery, showing its compact design and contact points.
2. Safety Information
WARNING: To prevent injury, read this manual and any associated radio manual before use. Improper handling of batteries can lead to fire, explosion, or other hazards.
- Do not disassemble, crush, puncture, or short-circuit the battery.
- Do not expose the battery to extreme heat (above 60°C / 140°F) or direct sunlight.
- Do not dispose of the battery in fire.
- Use only Motorola-approved chargers for this battery.
- Keep the battery away from water or other liquids.
- If the battery is damaged, do not use it. Contact authorized service personnel.
- Recycle batteries responsibly. Do not dispose of with household waste.

Figure 2: Detailed view of the battery label, indicating model number NTN9858C, NiMH chemistry, 2410 mAh capacity, and important safety symbols and warnings.
3. Setup and Installation
To install the NTN9858C battery into a compatible Motorola two-way radio:
- Ensure the radio is powered off.
- Align the battery with the battery compartment on the back of the radio.
- Slide the battery into place until it clicks securely. Ensure the battery latch engages properly.
- To remove, disengage the battery latch (if present) and slide the battery off the radio.

Figure 3: An example of a Motorola two-way radio with the NTN9858C battery properly installed, ready for operation.
4. Operating Instructions
4.1. Initial Charging
Before first use, fully charge the battery. For optimal performance and battery life, use a Motorola IMPRES charger. IMPRES chargers communicate with the battery to recondition it and extend its lifespan.
4.2. Charging Procedure
- Place the battery (or radio with battery attached) into a compatible Motorola IMPRES charger.
- Ensure the charging indicator on the charger illuminates, typically red for charging and green for fully charged.
- Allow the battery to charge until the indicator shows a full charge. This may take several hours depending on the battery's discharge level and charger type.
4.3. Usage
The NTN9858C battery provides reliable power for your two-way radio. Battery life will vary based on usage patterns (transmit time, receive time, standby time) and environmental conditions. For best performance, avoid completely discharging the battery regularly.
5. Maintenance and Storage
5.1. Cleaning
Clean the battery contacts periodically with a clean, dry cloth to ensure good electrical connection. Do not use abrasive cleaners or solvents.
5.2. Storage
- Store the battery in a cool, dry place, away from direct sunlight and extreme temperatures.
- For long-term storage, charge the battery to approximately 50% capacity.
- Avoid storing fully charged or fully discharged batteries for extended periods.
6. Troubleshooting
- Battery not charging: Ensure the battery is correctly seated in the charger and the charger is powered. Check for dirt or debris on battery and charger contacts.
- Short operating time: The battery may not be fully charged, or its capacity may have degraded over time. Ensure proper charging cycles. If using an IMPRES charger, it may recondition the battery.
- Radio not powering on: Ensure the battery is fully charged and properly installed. Check if the battery contacts are clean.
If issues persist, contact Motorola Solutions customer support or an authorized service center.
7. Specifications
| Feature | Specification |
|---|---|
| Model Number | NTN9858C |
| Battery Chemistry | Nickel-Metal Hydride (NiMH) |
| Voltage | 7.2V |
| Capacity | 2410 mAh |
| Dimensions | 4.8 x 2.2 x 1 inches (12.2 x 5.6 x 2.5 cm) |
| Item Weight | 10 ounces (283 grams) |
| Manufacturer | Motorola Solutions |
| Recommended Use | Radio battery replacement |
8. Warranty Information
Motorola Solutions provides warranty coverage for its original accessories. For the NTN9858C IMPRES NiMH battery, the warranty periods are as follows:
- Workmanship Warranty: 24 months
- Capacity Warranty (80% Rated Capacity): 18 months
All mission-critical, professional, and commercial radio accessories are warranted against workmanship defects for 12 months unless otherwise stated. Starting from the date those accessories are delivered from Motorola Solutions. For details of warranty terms and conditions, refer to your distribution agreement or the official Motorola Solutions warranty documentation.

Figure 4: Excerpt from the Motorola Solutions Accessory Warranty Periods document, detailing warranty terms for original batteries and other accessories.
9. Support
For further assistance, technical support, or service inquiries regarding your Motorola IMPRES NTN9858C battery, please contact Motorola Solutions customer service or visit their official website:
Motorola Solutions Official Website: www.motorolasolutions.com
You may also refer to the Motorola Solutions Store on Amazon for additional product information and support resources.





