The Motorola APX 1000 is a compact P25 portable radio designed for dependable professional communication. Like every portable radio, however, it is only as reliable as the battery attached to it. Choosing the correct APX 1000 battery affects runtime, radio weight, charger compatibility and the user's confidence during a shift.
Several batteries may fit the APX 1000, but they do not all offer the same capacity, environmental protection or safety approvals. Some are slim and lightweight. Others provide higher capacity for longer shifts. Motorola IMPRES batteries can also communicate with compatible chargers to support automated battery maintenance and fleet-management features.
This guide compares popular APX 1000 batteries, explains the specifications that matter and helps you choose the right OEM or replacement battery for your organization.
Quick Answer: Which Battery Fits the Motorola APX 1000?
Compatible options commonly listed for the APX 1000 include the NNTN8128BR, PMNN4424, PMNN4448, NNTN8560A and PMNN4489B. The best choice depends on the capacity, profile, IMPRES functionality, environmental rating and safety approval required by your operation.
Always verify the complete battery part number and suffix before ordering. Product revisions can affect specifications, and hazardous-location users must confirm that the radio-and-battery combination is approved for the intended environment.
APX 1000 Battery Comparison
| Battery | Capacity | Chemistry | Smart technology | Environmental or safety feature | Best suited for |
| NNTN8128BR | 2,000 mAh | Li-Ion | IMPRES | IP67 | Slim profile and everyday use |
| PMNN4424 series | 2,300 mAh | Li-Ion | IMPRES | IP67 | Balanced capacity and size |
| NNTN8560A | 2,500 mAh | Li-Ion | IMPRES | Verify required approval | Moderate-to-heavy daily use |
| PMNN4448 series | 2,800 mAh | Li-Ion | IMPRES | IP67 | Longer shifts and higher activity |
| PMNN4489B | 2,900 mAh | Li-Ion | IMPRES | IP68 and TIA-4950 listing | High capacity and qualifying hazardous-location applications |
Specifications should be confirmed on the individual product page before purchase. A larger mAh number usually indicates more stored energy when comparing batteries for the same radio platform, but actual runtime depends on radio settings, transmit activity, temperature and battery condition.
NNTN8128BR: Slim APX 1000 IMPRES Battery
The Motorola NNTN8128BR battery is a 2,000 mAh lithium-ion IMPRES battery with an IP67 rating. Its slim design makes it a practical choice when radio size and weight are priorities.
The NNTN8128BR can work well for:
- Standard-length shifts with moderate radio use
- Supervisors and administrative personnel
- Users with regular access to a charger
- Fleets that prioritize a thinner radio profile
- Organizations already using compatible IMPRES chargers
The tradeoff is lower capacity than the larger APX 1000 battery options. Users with frequent transmissions, high audio volume or long periods away from charging may benefit from a higher-capacity battery.
PMNN4424: A Balanced APX 1000 Replacement Battery
The PMNN4424 battery is associated with 2,300 mAh lithium-ion IMPRES configurations and an IP67 rating. It offers more capacity than the slim NNTN8128BR while maintaining a practical size for daily carry.
This part number has appeared with suffixes such as PMNN4424A, PMNN4424B and PMNN4424AR. Because manufacturers revise and discontinue products over time, confirm whether the item offered is OEM, replacement or a superseding model. Also verify the advertised capacity and included belt clip before ordering.
The PMNN4424 category is a useful middle-ground option for organizations that want more runtime than a slim battery without automatically moving to the largest available pack.
NNTN8560A: 2,500 mAh IMPRES Battery
The Motorola NNTN8560A is a 2,500 mAh lithium-ion IMPRES battery published as compatible with the APX 1000 and several related radio platforms. Its capacity places it between the PMNN4424 and higher-capacity PMNN4448 or PMNN4489 options.
For many users, 2,500 mAh provides a useful balance of operating capacity and manageable size. It may be appropriate for patrol, security, field service and public-works users whose radio activity varies throughout the day.
If your organization operates in classified hazardous locations, do not select a battery based only on fit or capacity. Confirm the exact radio model, battery revision and current approval documentation as a complete system.
PMNN4448: High-Capacity APX 1000 Battery
The Motorola PMNN4448 battery is listed as a 2,800 mAh lithium-ion IMPRES battery with an IP67 rating. It is a strong candidate for users who need longer operating time but do not require the specific hazardous-location listing associated with another battery.
A higher-capacity APX 1000 battery can be useful for:
- Long shifts
- Frequent transmit activity
- Incident response
- Remote assignments
- Cold-weather work
- Users who cannot regularly return to a charger
Capacity is only one factor. Compare the complete battery dimensions and weight if the radio must fit an existing holster, carry case or uniform setup.
PMNN4489B: 2,900 mAh IP68 APX 1000 Battery
The Motorola PMNN4489B is listed as a 2,900 mAh lithium-ion IMPRES battery with an IP68 rating and TIA-4950 intrinsically safe approval information. It combines the highest capacity in this comparison with enhanced environmental protection.
The PMNN4489B may be an appropriate choice for qualifying industrial or public-safety operations that need a rugged, high-capacity battery. Hazardous-location compliance must always be evaluated carefully. A battery's individual listing does not make every radio configuration intrinsically safe. Use only combinations approved for the exact radio, battery and operating environment.
How Long Does an APX 1000 Battery Last?
Motorola publishes typical APX 1000 operating ranges of approximately 8–10 hours with a standard battery and 10–12 hours with an extended battery, based on a 5/5/90 duty cycle. That test cycle represents roughly 5% transmitting, 5% receiving and 90% standby time.
Real-world APX 1000 battery life can be shorter or longer. Important variables include:
- Frequency and length of transmissions
- Signal strength and transmit power
- Speaker volume
- Display and backlight use
- GPS, Bluetooth and other enabled features
- Scanning and network activity
- Ambient temperature
- Battery capacity, age and condition
Do not promise users a specific number of hours based on mAh alone. The most dependable approach is to test the battery with the department's actual radio programming, accessories and duty cycle.
What Is IMPRES Technology?
IMPRES is Motorola's intelligent battery and charging system. Compatible batteries store information and communicate with compatible IMPRES chargers. This allows the system to automate certain charging and maintenance functions and can provide useful battery-condition information.
Depending on the battery, charger and fleet-management setup, IMPRES features may include:
- Adaptive charging
- Automated reconditioning decisions
- Battery capacity information
- End-of-life indicators
- Battery identification and service data
- More consistent fleet maintenance
Buying an IMPRES battery is only part of the system. The organization must also use a compatible charger to access the intended smart features. A non-IMPRES charger may charge certain batteries, but it will not necessarily provide IMPRES communication or maintenance functions.
APX 1000 Battery Chargers
Before replacing a large number of batteries, inventory the chargers already in use. Confirm the charger model, cup or insert, software requirements and supported battery chemistry.
Compatible products available from Battery Distributors include:
- PMPN4576A IMPRES 2 single-unit charger
- NNTN7616 vehicle IMPRES charger
- WPLN4232A single-unit charger
- WPLN4219D replacement multi-unit charger
A battery that physically sits in a charger cup is not automatically a fully supported combination. Verify chemistry, voltage and smart-technology compatibility before use.
OEM vs. Aftermarket APX 1000 Batteries
Organizations can choose between OEM Motorola batteries and professionally manufactured replacement batteries. Both categories can be appropriate when the product is correctly matched to the radio and operating requirement.
Advantages of OEM Motorola Batteries
- Manufacturer-published compatibility
- IMPRES functionality on applicable models
- Clear product revision and certification information
- A straightforward choice for standardized fleets
- Required or preferred in some safety-sensitive applications
Advantages of Quality Replacement Batteries
- Lower purchase cost
- Higher-capacity options may be available
- Warranty coverage from established suppliers
- Smart-technology choices for compatible systems
- Lower total replacement expense across a large fleet
Compare more than price. Review capacity, cells, protection circuitry, housing quality, IP rating, smart functionality, warranty and supplier support. If an intrinsically safe approval is required, never substitute a battery without confirming the exact approved radio-and-battery combination.
How to Choose the Best APX 1000 Battery
Use this process before ordering:
- Confirm the radio model. Verify that the radio is an APX 1000 and record any complete model information.
- Record the existing battery number. Note the base part number and suffix printed on the battery.
- Choose the required capacity. Match capacity to shift length and real radio activity.
- Consider size and weight. Higher capacity can make the radio thicker or heavier.
- Verify IMPRES requirements. Confirm whether your chargers and fleet-management process use IMPRES data.
- Check environmental protection. Select an IP rating appropriate for expected dust and water exposure.
- Verify safety approvals. Confirm the complete radio-and-battery combination for hazardous locations.
- Inventory chargers. Make sure every charging location supports the new battery.
- Review the warranty. Compare both coverage length and the supplier's replacement process.
- Test before a fleetwide order. Evaluate sample batteries during normal shifts.
How to Extend APX 1000 Battery Life
Good maintenance helps maximize performance and makes failures easier to predict.
Keep Batteries Away From Excessive Heat
Heat accelerates lithium-ion aging. Avoid storing radios and batteries in hot vehicles or near heating equipment. Use a clean, dry and temperature-controlled storage area whenever practical.
Use the Correct Charger
Charge APX 1000 batteries only with equipment designed for the battery platform and chemistry. Smart batteries need compatible IMPRES charging equipment to support intelligent features.
Inspect Battery Contacts
Dirty or damaged contacts can cause charging problems and intermittent radio power. Inspect the contacts on the battery, radio and charger. Follow manufacturer-approved cleaning procedures.
Rotate Fleet Batteries
Assign asset numbers and in-service dates. Rotate spares so one set is not repeatedly used while another remains idle. Track runtime complaints by battery rather than by radio alone.
Remove Damaged Batteries From Service
Do not continue using a battery that is swollen, cracked, leaking, unusually hot or unable to latch securely. Isolate damaged lithium-ion batteries and follow applicable workplace and local disposal procedures.
When Should an APX 1000 Battery Be Replaced?
Consider replacement when a battery:
- No longer completes the required shift
- Causes the radio to shut down while transmitting
- Produces repeated charger fault indications
- Charges inconsistently
- Becomes swollen or physically distorted
- Has cracked housing or damaged latches
- Shows corroded, burned or deeply worn contacts
- Runs unusually hot during charging or use
Reduced runtime does not always prove the battery is defective. Check the charger, radio contacts, programming and recent changes in user activity. When multiple batteries decline at the same time, look for a fleet-level issue rather than replacing parts without diagnosis.
Frequently Asked Questions About APX 1000 Batteries
What battery fits the Motorola APX 1000?
Commonly listed compatible batteries include the NNTN8128BR, PMNN4424, PMNN4448, NNTN8560A and PMNN4489B. Confirm the exact part number, revision, specifications and charger compatibility before purchase.
Are APX 1000 and APX 6000 batteries interchangeable?
No. The APX 1000 and APX 6000 belong to different battery platforms. Do not assume that a battery for one APX radio fits another APX model.
What is the highest-capacity APX 1000 battery?
Among the products compared in this guide, the PMNN4489B is listed at 2,900 mAh. Replacement-battery capacities may differ, so verify the current specifications and dimensions on the product page.
Does a higher-capacity battery always provide longer runtime?
A higher mAh rating generally means more stored energy when batteries share the same voltage and radio platform. Actual runtime also depends on transmitting, signal conditions, features, volume, temperature and battery age.
Can APX 1000 IMPRES batteries use a regular charger?
Some compatible non-IMPRES chargers may charge certain batteries, but they will not provide all IMPRES communication and maintenance functions. Always verify the exact battery-and-charger combination.
Which APX 1000 battery is intrinsically safe?
The PMNN4489B is published with TIA-4950 intrinsically safe information. Hazardous-location approval applies to specified equipment combinations, not to the battery in isolation. Confirm the exact radio, battery revision and applicable approval documentation.
How many hours does an APX 1000 battery last?
Motorola publishes typical ranges of approximately 8–10 hours for a standard battery and 10–12 hours for an extended battery under a 5/5/90 duty cycle. Actual operating time varies substantially by use and conditions.
Buy APX 1000 Batteries With Confidence
The best APX 1000 battery is the one that reliably meets the user's shift, fits the radio and charger, and satisfies the organization's environmental and safety requirements. A slim 2,000 mAh battery may be ideal for a lighter everyday setup, while a 2,800 or 2,900 mAh option may better support long shifts and frequent radio use. Check out our APX Compatibility page to see what battery is right for you.
Battery Distributors supplies OEM Motorola batteries, dependable replacement batteries and compatible charging solutions for the APX 1000. If you are unsure which product to order, provide the radio model, current battery part number, charger model and required safety approval. Our team can help identify appropriate options before you purchase.
APX 1000 Batteries: Compatibility & Buying Guide