Motorola Mag One Q5 Replacement Battery PMNN4423A 7.4V
Check that your old battery model number and device model to match our description. This makes sure they work together.
We ship your order same day if you buy it before 4 PM EST.
Motorola Mag One Q5 Replacement Battery PMNN4423A 7.4V - is backordered and will ship as soon as it is back in stock.
Let customers speak for us
Send Your Battery Photo
Expert Technician Help
Snap a photo or video of your battery and send it to us. We'll identify the exact replacement—fast and hassle-free. Our team has helped thousands of customers find the right battery quickly and easily.
POST YOUR BATTERY IMAGE
Product & Solutions Expert
✉ sales@batteryweb.com
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 Mag One Q5 Replacement Battery PMNN4423A 7.4V - is backordered and will ship as soon as it is back in stock.
Voltage
7.4V
Amp
2600mAh
Motorola Mag One Q5 / Q9 / Q11 / VZ-9 Series — 7.4V Li-ion Replacement Battery (PMNN4423A)
This is a 7.4V, 2600mAh Li-ion battery for the Motorola Mag One Q5, Q9, Q11, and VZ-9 two-way radios, replacing OEM part number PMNN4423A. It fits the compact Mag One body shell and mates with the original charging dock and belt clip. Voltage and cell count match the OEM spec exactly.
- Mag One Q5 / Q9 / Q11 / VZ-9 platform fit: These models share the same 7.4V two-cell Li-ion architecture, connector pinout, and BMS handshake protocol — which is why one pack covers the full range. Swapping between models in this family does not require any firmware or dock adjustment.
- Bench tested on actual hardware: We cycled this pack in a Mag One dock and monitored BMS behaviour through charge acceptance, PTT transmit draw, and termination. The BMS accepted full charge current without tripping and cut off cleanly at the upper voltage threshold.
- First insertion into the Mag One dock: If the dock shows a fault LED on first insertion, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The Mag One platform requires a clean contact cycle to complete the BMS handshake before charging begins.
Why the Mag One Q5 cuts out mid-transmission on a new PMNN4423A pack
A new Li-ion cell ships at storage voltage — typically 3.6–3.7V per cell, not full charge. When the radio keys up for TX, it pulls a sharp current spike. If the pack has not been charged first, that spike can push the BMS into an overcurrent trip, cutting the transmission instantly. This is not a faulty pack — it is the BMS protecting cells that are below the load threshold. Charge the battery fully in the dock before first use on-radio, and the issue does not recur.
Bar indicator showing one fewer bar than expected after fitting a new PMNN4423A
The Mag One Q-series uses a voltage-threshold bar indicator — it reads resting cell voltage and maps it to bars, with no fuel gauge chip involved. A new pack at storage voltage reads lower than a freshly charged pack, so the indicator correctly shows fewer bars even though the cell is not depleted. Run the pack through one full charge cycle in the dock. After a full charge, the resting voltage should sit above 8.2V and the indicator will reflect that.
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
My Mag One Q5 cuts out every time I press PTT — could the new PMNN4423A battery be causing this?
Yes, and it is almost always a storage-voltage issue, not a faulty pack. New Li-ion cells ship at roughly 3.6–3.7V per cell, and the transmit current spike on PTT can trip the BMS before the cells have been brought up to full charge. Charge the pack completely in the Mag One dock before putting the radio into service. After one full charge cycle, PTT cutouts caused by this stop.
The Mag One dock is blinking a fault LED and won't start charging the new PMNN4423A — what's wrong?
The Mag One dock runs a contact-check before it opens the charge circuit, and a weak connection at the gold strip will cause a fault blink rather than a charge start. Remove the pack, wipe the gold contacts on both the battery and the dock cradle with a dry cloth, then reseat the pack with firm downward pressure. If the fault LED persists after reseating, check that the pack voltage reads above 6.0V with a multimeter — a pack below that threshold may need a short trickle-charge cycle before the dock accepts it.
My Mag One Q5 transmits fine at the start of a shift but drops to low power by midday — is this the battery?
This is voltage sag under sustained RF output, not a capacity fault. As the cells discharge through the shift, voltage under transmit load drops faster than resting voltage suggests — the radio's TX power management steps down output to stay within the voltage window. The fix is to top up the pack at the midpoint of long shifts rather than running it down fully each cycle. If sag starts noticeably earlier each week, the cells are entering degradation and the pack needs replacement.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Related Products
Engineered for Performance. Built to Last.
Check out our top-rated selection of reliable products built to last. We offer high-quality options that deliver consistent performance for all your needs.
-
Up to 20% offNew arrival
BatteryWeb
Motorola GP900 NTN7143 Replacement Battery 7.4V 1200mAh
0.67 lb
Sale priceFrom $39.99 USD Regular price $49.99Unit priceIn stock (192 units) -
-
Up to 19% offNew arrival
BatteryWeb
Motorola NTN7143 GP900 Replacement Battery 7.4V 1800mAh
0.71 lb
Sale priceFrom $42.99 USD Regular price $52.99Unit priceIn stock (93 units) -
-
Up to 20% offNew arrival
BatteryWeb
Motorola CP110 PMNN6035 Replacement Battery 7.4V 1100mAh
0.61 lb
Sale priceFrom $39.99 USD Regular price $49.99Unit priceIn stock (174 units) -
-
Up to 20% offNew arrival
BatteryWeb
Motorola DP3000e Compatible Battery 7.4V 1600mAh PMNN4440
0.32 lb
Sale priceFrom $40.99 USD Regular price $50.99Unit priceIn stock (60 units) -
-
Up to 20% offNew arrival
BatteryWeb
Motorola MTP600 Replacement Battery 3.7V 1650mAh Li-ion
0.48 lb
Sale priceFrom $47.99 USD Regular price $59.99Unit priceIn stock (60 units) -
-
Up to 19% offNew arrival
BatteryWeb
Motorola MTP600 Compatible Battery 3.7V 2900mAh Li-ion
0.61 lb
Sale priceFrom $57.99 USD Regular price $71.99Unit priceIn stock (354 units) -
-
Up to 20% offNew arrival
BatteryWeb
Motorola PMNN4423A Mag One Q5 Replacement Battery 7.4V 1100mAh
0.33 lb
Sale priceFrom $34.99 USD Regular price $43.99Unit priceIn stock (150 units) -
-
Up to 20% offNew arrival
BatteryWeb
Motorola CP040 Compatible Battery 7.5V 2600mAh PMNN4254
0.88 lb
Sale priceFrom $33.99 USD Regular price $41.99Unit priceIn stock (216 units) -
