Motorola’s current documentation identifies the PMPN4591 as an IMPRES 2 multi-unit charger for APX NEXT and APX N70 platforms. It provides six charging positions, six displays, six USB ports, 100–240V input, and up to 3A per charging pocket. docs.motorolasolutions.com

Motorola PMPN4591 IMPRES 2 Six-Unit Charger with Displays and USB Ports

The Motorola PMPN4591 is an OEM IMPRES 2 multi-unit fast charger designed for compatible Motorola APX NEXT and APX N70-series portable radios and batteries. It features six charging positions, six individual information displays and six integrated USB charging ports, providing a complete centralized charging solution for public-safety and professional radio fleets.

Each charging position can deliver up to 3 amps of charging current and can accept a compatible battery by itself or attached to a radio. Motorola IMPRES 2 technology automatically manages charging, calibration and battery maintenance while giving fleet managers access to important battery information.

The six integrated USB ports can be used to power compatible accessories and mobile devices, reducing the number of separate wall adapters needed in an equipment room, dispatch center, fire station or command facility.

Motorola PMPN4591 Quick Specifications

What Radios Does the PMPN4591 Work With?

With the correct installed charging pockets and supported charger software, the Motorola PMPN4591 is designed for the following radio families:

• Motorola APX NEXT

• Motorola APX NEXT XE

• Motorola APX NEXT XN

• Motorola APX N70

• Motorola APX N70 XE

Compatibility depends on the installed charger pockets, radio model, battery part number and charger software. Confirm the complete PMPN4591 revision and pocket configuration when purchasing a replacement charger or charger base.

Browse the Motorola APX NEXT product category or read the complete Motorola APX radio guide for help comparing APX radio platforms.

Does the PMPN4591 Charge APX 6000 or APX 8000 Batteries?

The standard PMPN4591 configuration should not be assumed to support batteries for the APX 6000, APX 7000, APX 8000, APX 8000XE, APX 900 or SRX 2200.

These traditional APX radios use a different battery form factor. Organizations operating those radios should consider the NNTN8844 IMPRES 2 multi-unit charger or another charger equipped with the correct traditional APX pockets.

APX NEXT Batteries Compatible with the PMPN4591

Compatible APX NEXT battery options include:

Battery availability and revision letters can change. Confirm the complete battery number and radio configuration before ordering.

APX N70 Batteries Compatible with the PMPN4591

The PMPN4591 also supports Motorola APX N70 batteries when equipped with the appropriate charging pockets.

The PMNN4816 is a compact standard-capacity option. The PMNN4817 provides the highest capacity among these primary APX N70 batteries. The PMNN4818 is the safety-rated option for approved radio configurations and operating environments.

View additional Motorola radio batteries.

Motorola IMPRES 2 Battery Management

IMPRES 2 is Motorola’s intelligent charging and battery-management system. The PMPN4591 communicates with compatible Motorola batteries and automatically adjusts the charging process according to battery condition, temperature, charging history and remaining capacity.

IMPRES 2 benefits include:

• Simultaneous charging of up to six radios or batteries

• Up to 3-amp charging per compatible pocket

• Automatic recognition of compatible IMPRES batteries

• Individual battery and charging information

• Automated battery calibration

• More accurate capacity information

• Reduced need for manual battery maintenance

• Support for standard- and high-capacity batteries

• Improved fleet-level battery visibility

• Six integrated USB charging ports

Actual battery life depends on battery age, radio settings, transmission activity, broadband use, operating temperature, storage and charging practices.

What Information Do the Six Displays Provide?

Each charging position has an individual information display. Depending on the installed battery, charger software and operating mode, available information may include:

• Charging status

• Battery part number

• Battery serial number

• Rated battery capacity

• Current available capacity

• Initial or “day one” capacity

• Calibration status

• Reconditioning status

• Battery service information

The displays allow fleet managers to identify aging batteries and monitor charging without removing batteries from the charger.

PMPN4591 Charging Time

The PMPN4591 is a fast charger capable of supplying up to 3 amps per compatible charging pocket. Exact charging time depends on:

• Battery capacity

• Remaining battery charge

• Battery age and condition

• Battery temperature

• Whether calibration is required

• Whether a radio is operating while charging

A partially discharged standard-capacity battery normally finishes charging faster than a completely depleted high-capacity battery. An IMPRES calibration cycle also takes longer than an ordinary charge.

For the fastest and most consistent results, turn radios off before placing them in the charger.

Six Integrated USB Charging Ports

A significant advantage of the PMPN4591 is its six integrated USB charging ports. These ports can reduce countertop clutter and the need for additional AC adapters when users must also charge compatible electronic accessories.

USB charging may be useful for:

• Compatible wireless audio accessories

• Mobile devices

• Body-worn accessory equipment

• Other approved USB-powered equipment

The USB ports do not replace the main radio charging pockets. Use only approved cables and devices that meet the charger’s USB power requirements.

PMPN4591 vs NNTN9115

The PMPN4591 and NNTN9115 are both six-position IMPRES 2 chargers designed for compatible APX NEXT fleets.

Choose the PMPN4591 when integrated USB charging and broader APX NEXT/APX N70 fleet support are important.

Choose the Motorola NNTN9115 when you need a dedicated six-position APX NEXT charger and do not require integrated USB ports.

PMPN4591 vs NNTN9199

The PMPN4591 is intended for fleet charging, while the NNTN9199 is designed for an individual user.

Choose the PMPN4591 for a shared fleet. Choose the Motorola NNTN9199 single-unit charger for one compatible APX NEXT radio or spare battery.

Other Compatible and Alternative Chargers

Browse the complete selection of APX NEXT and APX NEXT XN chargers.

Compatible Charger Accessories

AS000178A01 / AS000178A02 Charging Pocket

The AS000178A01 and AS000178A02 pocket revisions are used with compatible Motorola multi-unit chargers for selected APX NEXT and APX N-series radios and batteries.

A charger software update may be required when installing or replacing charging pockets. Confirm pocket and software compatibility before installation.

NLN7967 Wall-Mount Bracket

The NLN7967 allows a compatible Motorola multi-unit charger to be mounted securely to a wall. It is useful in equipment rooms, fire stations, police facilities and command centers where counter space is limited.

3087791G01 North American Power Cord

The 3087791G01 is a replacement North American power cord for compatible Motorola IMPRES 2 multi-unit chargers. Verify the charger revision before ordering replacement power components.

Other Compatible APX NEXT Products

Complete an APX NEXT charging and communications system with compatible accessories such as:

• Motorola PMMN4135A APX NEXT speaker microphone

• Motorola PMMN4154A XVE500 extreme-temperature speaker microphone

• Motorola AN000296A01 APX NEXT antenna

• Motorola PMLN7948A hybrid leather holster

• Motorola PMLN7947A plastic carry holster

• Motorola PMLN8120A listen-only earpiece

Use the Motorola APX remote speaker microphone guide to compare compatible microphone options.

Other Compatible APX N70 Products

Available APX N70 accessories include:

• Motorola PMNN4817A 4,400mAh battery

• Motorola PMLN8371A plastic carry holster

• Motorola PMLN8372A hybrid holster for the standard battery

• Motorola PMLN8373A hybrid holster for the high-capacity battery

• Motorola PMKN4265A programming cable

• Motorola PMLN8297A NEXUS PTT adapter

Accessory compatibility depends on the exact radio model, battery size, firmware and safety configuration.

Is the PMPN4591 HAZLOC Approved?

The PMPN4591 should not be operated in a hazardous atmosphere unless the charger and charging location are specifically approved for that use.

The charger can charge compatible safety-rated batteries, including selected NNTN9217, NNTN9088, NNTN9090, PMNN4812, PMNN4818 and PMNN4896 revisions. However, placing a safety-rated battery in the charger does not make the charger itself HAZLOC certified.

Safety-rated batteries should be charged in a designated non-hazardous location according to agency procedures and applicable safety requirements.

OEM Motorola vs Replacement Multi-Unit Chargers

An OEM Motorola PMPN4591 is designed to communicate with compatible Motorola IMPRES and IMPRES 2 batteries. This communication supports battery identification, calibration, charging history and capacity information that may not be available from a basic aftermarket charger.

OEM advantages include:

• Full IMPRES 2 battery communication

• Up to 3-amp charging per compatible pocket

• Six individual information displays

• Six integrated USB ports

• Automatic battery calibration

• Battery identification and capacity information

• Replaceable charging-pocket design

• Motorola manufacturing and quality control

• Manufacturer warranty coverage

• Compatibility with Motorola fleet-maintenance procedures

Before selecting an aftermarket charger, confirm support for:

• The exact radio and battery models

• Charging with the battery attached to the radio

• IMPRES 2 battery communication

• Automatic calibration

• Battery diagnostic information

• Standard- and high-capacity batteries

• Safety-rated battery configurations

Frequently Asked Questions

Is PMPN4591 the same as PMPN4591A or PMPN4591B?

PMPN4591 is the base part number. PMPN4591A and PMPN4591B identify Motorola product revisions. Confirm the revision supplied when ordering.

How many radios can the PMPN4591 charge?

It can charge up to six compatible radios or batteries simultaneously.

Does the PMPN4591 work with the APX NEXT?

Yes. It supports compatible APX NEXT radios and batteries when equipped with the correct charging pockets.

Does it work with the APX NEXT XE?

Yes. It supports compatible APX NEXT XE batteries and radio configurations.

Does it work with the APX NEXT XN?

Yes. It supports compatible APX NEXT XN configurations, including approved PMNN4812 battery revisions.

Does it work with the APX N70?

Yes. The PMPN4591 supports APX N70 and APX N70 XE radios and batteries when fitted with the appropriate pockets.

Does it charge APX N30 or APX N50 batteries?

The PMPN4594 is the more appropriate multi-unit charging platform for APX N30 and APX N50 batteries. Do not assume PMNN4813 or PMNN4815 batteries fit the PMPN4591 without verifying the installed pockets.

Can batteries be charged without the radios?

Yes. Compatible batteries can be inserted directly into the charging pockets.

Can radios be charged with batteries attached?

Yes. Compatible radios can be placed in the charger with their batteries installed.

Can different battery capacities be charged simultaneously?

Yes. Compatible standard- and high-capacity batteries can occupy different charging positions. Each position manages its battery separately.

Does every charging position have a display?

Yes. The PMPN4591 has six charging positions and six individual displays.

How many USB ports does the PMPN4591 have?

It has six integrated USB charging ports.

Does the charger include the AC power cord?

The US/NA kit normally includes the appropriate North American AC power cord. Confirm package contents when purchasing a used, open-box or replacement charger base.

Can the PMPN4591 be wall mounted?

Yes. A compatible Motorola wall-mount bracket is available separately.

Does it charge HAZLOC batteries?

It can charge compatible safety-rated batteries, but the charger itself should be operated only in a designated non-hazardous charging area.

What is the closest alternative to the PMPN4591?

The NNTN9115 is the closest six-position alternative for an APX NEXT fleet. It provides six IMPRES 2 charging positions and six displays but does not include the PMPN4591’s integrated six-port USB charging bank.

What is the best single-unit alternative?

The NNTN9199 is a suitable single-unit IMPRES 2 option for compatible APX NEXT radios and batteries. The PMPN4604 is another single-position option for supported APX NEXT and APX N-series configurations.

Why Buy the Motorola PMPN4591?

The Motorola PMPN4591 combines six-position fast charging, IMPRES 2 battery management, six diagnostic displays and six USB charging ports in one fleet-ready unit. It is an excellent choice for organizations that operate APX NEXT or APX N70 radios and need a centralized charging solution with advanced battery information.

Before ordering, confirm:

• Complete radio model

• Battery part number

• Required UL or HAZLOC classification

• Installed charging pockets

• Charger software requirements

• North American power configuration

• Desktop or wall-mounted installation requirements

Contact Battery Distributors for help matching the PMPN4591 with the correct APX NEXT or APX N70 batteries, charging pockets, power components, microphones, antennas, holsters and other radio accessories.