The Motorola PMNN4409 battery is the standard IMPRES pack for the most deployed DMR portable platform in the world: the MOTOTRBO XPR 7000 and XPR 6000 series. Every XPR 7550 and XPR 7350 that leaves a Motorola distribution center ships with a PMNN4409 or its direct predecessor. The installed base of compatible radios numbers in the millions. When a fleet manager orders replacement batteries for the XPR portables in the charging bay, this is the part number that appears on the purchase order.
This XPR 7550 IMPRES battery communicates state-of-charge, temperature, and cycle data to the IMPRES charger with every dock. The charger reads the actual cell voltage under load during the initial charge phase and adjusts the current curve in real time. An aftermarket pack without this data handshake forces the charger into a generic profile that undercharges to protect unknown cell chemistry. The result is a pack that shows full on the gauge but delivers 20 percent less talk time than the labeled capacity. A genuine PMNN4409 delivers 2900 mAh at 7.4 volts nominal because the charger knows exactly what cells it is charging. One battery SKU covers the entire XPR 7000 family and backward-compatible XPR 6000 series portables, simplifying spare inventory for mixed-generation fleets.
Description
Millions of MOTOTRBO XPR portables operate in warehouses, factories, hotels, and transport hubs worldwide. Every one of them will need a replacement battery at some point in its service life. The Motorola PMNN4409 battery is that replacement.
IMPRES Smart: The Difference That a Data Line Makes
An IMPRES charger connected to a genuine Motorola PMNN4409 battery is not just applying voltage. It is reading the pack’s internal data. Cell temperature, charge-cycle count, internal resistance, and discharge depth all transmit to the charger during the first seconds of contact. The charger uses this data to select the optimal charge rate for those specific cells at that specific age. A pack with 300 cycles and elevated internal resistance gets a gentler charge curve to prevent overheating. A fresh pack gets full current for the fastest possible turnaround. An aftermarket pack with no data line gets a one-size-fits-all profile that maximizes safety margin at the expense of speed and capacity. The genuine pack charges faster and lasts longer because the charger knows what it is dealing with.
One Part Number for Two Radio Generations
Fleet managers dealing with mixed-generation XPR fleets fear inventory fragmentation. This PMNN4409 2900mAh pack eliminates that concern. It fits every XPR 7000 series portable: XPR 7550, XPR 7550e, XPR 7350, XPR 7350e, and XPR 7380. It is backward-compatible with the XPR 6000 series: XPR 6550 and XPR 6350. A hotel running XPR 7550e portables at the front desk and older XPR 6550 portables in housekeeping stocks a single battery SKU. The same IMPRES multi-unit charger charges both. The same spare inventory services both. When the budget cycle allows replacing the 6000-series radios with newer 7000-series units, the battery stock does not become obsolete.
The Battery That Ships With the Radio
A replacement battery should perform identically to the original. This IMPRES smart DMR radio battery is the original. It is the same PMNN4409 part number that ships in the box with a new XPR 7550e. Cell sourcing, protection circuit design, and IMPRES firmware are factory-matched to the radio’s power management system. The 2900 mAh capacity is rated under the same 5-5-90 duty cycle that Motorola uses for all XPR runtime specifications. A partial charge during a lunch break does not create a memory effect because Li-Ion chemistry eliminates that limitation. The pack charges from any starting state to full without preconditioning.
Technical Specifications and Warranty
Every Motorola PMNN4409 battery is a genuine OEM product with full warranty coverage.
- Chemistry: Lithium-Ion (Li-Ion)
- Capacity: 2900 mAh (nominal)
- Voltage: 7.4 V (nominal)
- Technology: IMPRES smart battery with data communication
- Compatibility: XPR 7550/e, 7350/e, 7380; XPR 6550, 6350, 6000 series
- Charger: IMPRES single and multi-unit chargers
- Memory Effect: None (Li-Ion chemistry)
- Warranty: 12 months standard OEM coverage
