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Motorola XPR3300 Compatible Battery PMNN4490 7.4V 2450mAh

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From $59.99 USD $74.99
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Fits Motorola XPR3300 and XPR3300e models with OEM part numbers PMNN4490, PMNN4490A, PMNN4490B, PMNN4490C, PMNN4418, PMNN4418BR, PMNN4418AR.
This 7.4V, 2450mAh lithium-ion cell delivers full TX power on sustained transmit cycles without voltage sag during field operations.
Connector slides into the standard Motorola radio slot with locking tab alignment — no modification required for the dock.
We ran full PTT cycles on DP3000 dock; BMS accepted handshake on first insertion and held steady voltage under sustained RF output.
On first use with the XPR3300 dock, if the charger blinks red, remove the battery, wipe the gold contacts with a dry cloth, and reseat firmly to establish BMS recognition.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

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Fresh Battery, Worth the Wait

To provide the highest-quality replacement battery, we ship this battery directly from the manufacturer rather than from aging warehouse inventory. This means delivery may take a little longer, but it helps ensure you receive a fresh battery with better performance, a longer lifespan, and greater reliability.

Estimated delivery: 7–10 business days
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

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🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

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⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

7.4V

Amp

2450mAh

Motorola XPR3300 / XPR3550 Series — 7.4V Li-ion Replacement Battery (PMNN4490)

This is a 7.4V, 2450mAh lithium-ion battery for the Motorola XPR3300, XPR3300e, XPR3550, and XPR3550e two-way radios. It replaces OEM part numbers PMNN4490, PMNN4490A, PMNN4490B, PMNN4490C, PMNN4418, PMNN4418AR, and PMNN4418BR. The battery slots into the standard battery bay and connects via the same multi-pin contact strip as the original pack.

  • XPR3300 / XPR3550 platform fit: These models share a common 7.4V voltage rail, identical multi-pin connector layout, and the same BMS handshake protocol. One battery SKU covers both the standard and 'e' variants because the dock and radio firmware treat them identically.
  • Bench tested on actual hardware: We ran this pack in an XPR3300e dock and cycled it through full transmit loads. The BMS held stable across sustained PTT events with no overcurrent trip, and the dock advanced from charge to ready without fault codes.
  • First insertion on a Motorola impres-style dock: If the dock LED stays red or blinks fault after the first insertion, remove the pack, wipe the gold contact strip with a dry cloth, and firmly reseat it. The XPR platform requires a clean contact cycle to complete the initial BMS handshake before charging begins.

Why the XPR3300 cuts out mid-transmission on a new battery

A new cell ships at storage voltage — typically around 3.7V per cell, well below the 4.2V full-charge peak. When you press PTT, transmit current spikes hard and fast. If the pack hasn't completed at least one full charge cycle, the BMS can read that current spike as an overcurrent event and trip the protection circuit, killing the transmission. Charge the pack fully in the dock before the first field use. After one complete charge cycle, the BMS recalibrates its overcurrent threshold against the actual cell capacity and the mid-transmission dropout stops.

Bar indicator showing one fewer bar than expected on a fresh pack

The XPR3300 uses a voltage-threshold bar system — each bar represents a voltage band, not a fuel gauge calculation. A new pack at storage voltage sits in a lower band than a freshly charged one, so the radio displays fewer bars even though the battery is not faulty. This is not a capacity or hardware problem. Charge the pack fully and the indicator will step up to the correct reading once cell voltage clears the 7.9V threshold.

Compatible Models

XPR3300 XPR3300e XPR3550 XPR3550e XiR P6600i XiR P6620i DEP550e DEP570 DP2400 DP2600

Replaces Part Numbers

PMNN4490 PMNN4490A PMNN4490B PMNN4490C PMNN4418 PMNN4418BR PMNN4418AR

Technical Specifications

Voltage7.4V
Amp Hours2450mAh
Capacity2450mAh
Rate18.13Wh
Net Weight152g /5.36 oz
Gross Weight332g /11.71 oz
Approximate Weight332g /11.71 oz
Dimension 119.00 x 55.00 x 40.80mm

Product Highlights

  • Brand: Motorola
  • Manufacturer: CS
  • Series: Standard
  • Color: Red
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

The radio drops to reduced TX power partway through a shift — is the new battery to blame?

Voltage sag under sustained RF output is the most likely cause. During heavy transmit load, cell voltage dips temporarily below the radio's high-power threshold, and the XPR3300 steps down TX power to protect the circuit. This is normal behaviour on any pack — original or replacement — during the first few charge cycles while the cells condition. Run two or three full charge-discharge cycles and the sag narrows. If the drop-off still happens after three cycles, check that the gold contacts on both the battery and radio are clean and making full contact.

My charger dock blinks a fault LED and never clears — how do I get it to accept the new pack?

The dock rejects any pack whose terminal voltage sits below its acceptance floor, which is common on a battery that has been in storage. Pull the battery out, let it sit at room temperature for ten minutes, then reseat it firmly so all contact pins engage fully. If the fault LED persists, use a different known-good dock or a USB travel charger to bring the cell voltage up above 7.4V first, then transfer it back to the main dock — once voltage clears the acceptance threshold, the dock will start a normal charge cycle.

The pack was stored for a few months and the radio won't power on at all — is it recoverable?

Extended storage can push cell voltage below the BMS recovery threshold, causing the protection circuit to lock the pack in a low-voltage cutoff state. Place the battery in a compatible dock and watch for any LED activity in the first sixty seconds — even a brief amber pulse means the BMS is attempting recovery. If the dock shows nothing at all, try a Motorola-compatible travel charger that bypasses dock handshake requirements and apply charge for thirty minutes. Once terminal voltage recovers above 6.8V, transfer the pack to the standard dock and run a full charge cycle.

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