Description
HazLoc Clamshell Battery Pack for Emergency Backup Power
Engineered for wildland firefighters and remote operations where traditional charging infrastructure is unavailable.
The Motorola PMNN4891A is a heavy-duty, hazardous location (HazLoc) approved clamshell battery pack designed to keep mission-critical portable radios operational during extended deployments. This enclosure allows compatible radios to run on standard, readily available AA batteries, serving as an essential emergency power backup when standard rechargeable battery packs cannot be replenished. The Motorola PMNN4819A is the updated version of the Motorola PMNN4891.
Built for public safety professionals, wildland fire crews, and industrial personnel working in rugged or remote environments, this pack solves the problem of radio downtime during prolonged power outages or off-grid field assignments. Before purchasing, buyers should note that the Motorola PMNN4891A requires 12 AA alkaline or lithium primary batteries, which are sold separately, and requires specific radio firmware to ensure proper operational telemetry.
To achieve complete compatibility and precise battery level reporting, the host radio must be running firmware version R36.01.00 or greater. Additionally, deploying the Motorola PMNN4891A automatically triggers the radio's low-power setting, and users must ensure their device's low-power operational parameter is configured to 2 Watts or less.
Key Features & Benefits
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Hazardous Location Certified: Fully HazLoc and NIFC approved for safe deployment in volatile or dangerous environments.
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High Ingress Protection: Features an IP68 ruggedized rating to withstand complete water submersion and blowing dust on challenging job sites.
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Dual-Chemistry Selector: Includes an internal battery-type switch to optimize telemetry for either 1.5 Volt Alkaline or 1.5 Volt Lithium AA cells.
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Rapid Toolless Installation: Designed to slide onto the radio chassis rails and securely snap into place using heavy-duty dual side latches.
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Motorola PMNN4891A Emergency Reliability: Eliminates grid dependency by instantly converting standard off-the-shelf commercial batteries into a dependable radio power source.
Specifications
| Attribute |
Details |
| Brand |
Motorola Solutions |
| Model/SKU |
PMNN4891A |
| Product Type |
Clamshell Battery Pack |
| Capacity |
12 AA Batteries (Alkaline or Lithium Primary) |
| Ingress Protection |
IP68 |
| Firmware Requirement |
R36.01.00 or greater |
| Power Restriction |
Forced low-power mode (2 Watts or less) |
| Dimensions |
6.45 Inches x 2.50 Inches x 2.29 Inches |
| Weight (Empty) |
9.9 Ounces |
Compatibility
| APX6000 |
APX6000XE |
APX8000 |
APX8000XE |
| APX8000H |
APX8000HXE |
SRX2200 |
|
What's Included
| Description |
SKU/Model |
Status |
| APX HazLoc Clamshell Battery Pack Housing |
PMNN4891A |
✅ Included |
| Internal 12-Cell AA Battery Tray |
PMNN4891A-Tray |
✅ Included |
| 1.5 Volt AA Alkaline or Lithium Batteries |
Commercial AA |
❌ Sold Separately |
Recommended Accessories
Frequently Asked Questions
What types of batteries can be used in the Motorola PMNN4891A?
The Motorola PMNN4891A is optimized exclusively for 1.5 Volt AA Lithium primary batteries or 1.5 Volt AA Alkaline primary batteries. You must never use 3.6 Volt Lithium batteries or mix different chemical types within the tray, as this can cause system malfunctions or damage the unit.
Does the Motorola PMNN4891A affect the radio's transmission power?
Yes, attaching the Motorola PMNN4891A automatically forces the radio into its low-power transmission setting. To ensure proper and reliable operation, your radio's low-power setting must be pre-configured to 2 Watts or less.
Is the Motorola PMNN4891A waterproof?
The Motorola PMNN4891A features an exceptional IP68 ingress protection rating, making it completely dust-tight and capable of continuous water submersion. This ensures maximum protection and performance in extreme weather conditions and wet environments.
Why is my radio showing an incorrect low battery alert with this pack?
An incorrect low battery indication usually means the internal Battery-Type-Selector switch is in the wrong position. You must manually toggle the internal switch inside the Motorola PMNN4891A housing to match the exact battery chemistry (Lithium or Alkaline) currently installed in the tray.
What firmware version is required for the Motorola PMNN4891A?
Your APX portable radio must be programmed with firmware version R36.01.00 or greater to be fully compatible with the Motorola PMNN4891A. Older firmware versions will not recognize the clamshell telemetry or battery status accurately.
Can I recharge this pack in a standard Motorola IMPRES desktop charger?
No, the Motorola PMNN4891A cannot be placed into a desktop charger. It uses non-rechargeable AA alkaline or lithium cells and must be powered down, opened, and manually replenished with fresh AA batteries when depleted.
Warranty
1-year manufacturer's warranty.
