Motorola PMNN4409 XPR7350 Replacement Battery 7.4V 3350mAh
Available by SPECIAL ORDER. Delivery for this product typically takes 2 weeks.
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Motorola PMNN4409 XPR7350 Replacement Battery 7.4V 3350mAh - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
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.
Delivery and Shipping
Delivery and Shipping
🔹 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.
Disclaimer
Disclaimer
⚠️ 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.
Motorola PMNN4409 XPR7350 Replacement Battery 7.4V 3350mAh - is backordered and will ship as soon as it is back in stock.
Voltage
7.4V
Amp
3350mAh
Motorola XPR7350 / XPR3000 Series — 7.4V Li-ion Replacement Battery (PMNN4409)
This 7.4V, 3350mAh lithium-ion battery replaces the PMNN4409 and compatible OEM packs across the Motorola XPR7350, XPR3000, XPR3500, and XPR3300 series portable radios. It fits the same physical footprint and connector as the original, and the BMS communicates with the radio's charge management circuitry without modification. Capacity comes from the cell, not the label — 3350mAh at 7.4V nominal.
- XPR / MOTOTRBO platform fit: The XPR3000, XPR3300, XPR3500, and XPR7350 share a common battery bay geometry and the same 7.4V voltage rail. All compatible OEM part numbers — including PMNN4409AR, PMNN4412, PMNN4448, PMNN4490, PMNN4491, PMNN4543, and PMNN4544 variants — map to this same electrical specification, which is why one replacement covers the full group.
- Bench tested on actual hardware: We ran this pack through charge and transmit cycles on the XPR platform. The BMS completed the handshake with the Motorola IMPRES dock without fault, held voltage through sustained PTT bursts, and the overcurrent protection tripped correctly at the rated threshold — not prematurely.
- First insertion into the IMPRES dock: If the dock LED shows a fault on first insertion, remove the pack and wipe the gold contact strip with a dry cloth before reseating. The IMPRES system requires a clean contact cycle to read the BMS data register — a contaminated contact can prevent charge acceptance entirely.
Why the XPR7350 cuts out mid-transmission on a new battery
The XPR7350 draws a sharp current spike the moment PTT is pressed — RF output pulls significantly more current than standby or receive mode. If the BMS registers this as an overcurrent event, it trips and momentarily disconnects the cell, cutting the transmission. On a new pack, this usually happens because the cells shipped at storage voltage (around 3.7–3.8V per cell) rather than full charge. A full charge cycle to 4.2V per cell resolves the trip threshold margin and the cutouts stop.
Bar indicator showing one fewer bar than expected on a fresh PMNN4409
The XPR radio reads battery state through voltage thresholds — each bar on the display corresponds to a voltage band. New cells arrive at storage voltage, not fully charged, so the radio correctly reports fewer bars than a full pack would show. This is not a capacity fault or a cell mismatch. Seat the battery in the charger dock until the LED goes green, then reinsert it into the radio — the bar indicator will reflect the actual full-charge voltage once the pack is topped up to 8.4V across both cells.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Motorola
- Manufacturer: CS
- Series: Standard
- Color: Black
- Product Type: Li-ion
- Battery Type: Li-ion
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
The radio transmits fine for a few seconds then the audio cuts — PTT still lights up but the signal drops. New battery, happened right out of the box.
This is a BMS overcurrent trip triggered by the RF transmit current spike. New cells ship at storage voltage, which leaves less headroom before the protection circuit kicks in. Charge the pack fully in the IMPRES dock first — a complete charge to green LED before the first use gives the BMS enough voltage margin to handle the PTT current surge without tripping. Retest after a full charge cycle.
My IMPRES dock is blinking amber and won't start charging the new pack — it was fine with the old battery.
An amber fault on the IMPRES dock usually means the dock couldn't complete the BMS handshake on insertion. Remove the pack, wipe the gold contact strip on the battery with a dry lint-free cloth, check the dock contacts for debris, then reseat the pack firmly until it clicks. If the dock still blinks amber, let it sit seated for 60 seconds — some IMPRES units run a slow pre-qualification pulse before accepting a pack that arrived below the dock's minimum acceptance voltage of approximately 6.0V.
Radio is running fine but drops to low TX power mid-shift — it's not cutting out completely, just noticeably weaker signal.
Sustained RF output causes voltage sag as the cells discharge under load — when the pack voltage drops below the radio's reduced-power threshold, the XPR7350 steps down transmit power automatically to protect the final amplifier stage. This is normal behaviour under heavy PTT use, not a faulty cell. Check the bar indicator when the power drop happens; if you're at one bar, the pack is genuinely low. If you're still showing two or more bars and the drop is happening early in the shift, reseat the pack to confirm the contact resistance isn't adding to the sag.
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