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Description
Motorola PMNN4818A IMPRES 2 Li-Ion 3650mAh TIA4950 Battery (IP68)Intrinsically Safe Cold Weather Power for APX N70 Series Deploy with confidence in hazardous locations using this TIA4950 certified 3650mAh IMPRES 2 battery. The Motorola PMNN4818A is a high performance IMPRES 2 Lithium Ion battery specifically engineered for the APX N70 and APX N70XE portable radios. This battery is TIA4950 certified as intrinsically safe, making it a critical requirement for users operating in environments where flammable gases,
Intrinsically Safe Cold-Weather Power for APX N70 Series
Deploy with confidence in hazardous locations using this TIA4950 certified 3650mAh IMPRES 2 battery.
The Motorola PMNN4818A is a high-performance IMPRES 2 Lithium-Ion battery specifically engineered for the APX N70 and APX N70XE portable radios. This battery is TIA4950 certified as intrinsically safe, making it a critical requirement for users operating in environments where flammable gases, vapors, or combustible dust may be present. With a substantial 3650mAh capacity, the PMNN4818A provides the extended duty cycles necessary for long shifts, ensuring your communication remains uninterrupted during mission-critical tasks in dangerous conditions. The Motorola PMNN4818A is the updated version of the Motorola PMNN4818.
Equipped with Motorola’s advanced IMPRES 2 technology, the PMNN4818A features a self-calibration capability that manages battery health automatically. When maintained with IMPRES 2 chargers, the battery eliminates the need for manual monthly reconditioning, saving hours of downtime and extending the overall life of the power cell. The rugged IP68-rated housing is submersible in up to 2 meters of water for 4 hours and is optimized for extreme cold-weather operations, supporting reliable radio performance in temperatures as low as -30°C.
Key Features & Benefits
- TIA4950 Intrinsically Safe: Certified for use in hazardous environments where explosive gases or dust are a constant risk.
- IMPRES 2 Smart Technology: Features automated self-calibration and maintenance to maximize life cycles and operational readiness.
- Extreme Cold Operation: The Motorola PMNN4818A is engineered to maintain full power delivery in freezing conditions down to -30°C.
- IP68 Submersible Rating: Ruggedized, dust-tight, and waterproof construction protects the battery during total submersion.
- High-Density 3650mAh Cell: Balanced design provides a high-capacity power solution while maintaining a manageable profile for the APX N70 series.
Specifications
| Attribute | Details |
| Brand | Motorola |
| Model/SKU | PMNN4818A |
| Product Type | IMPRES 2 Li-Ion Battery |
| Voltage | 7.4V |
| Battery Chemistry | Lithium-Ion (Li-Ion) |
| Capacity | 3650 mAh |
| IP Rating | IP68 (Submersible) |
| Intrinsic Safety | TIA4950 Certified |
| Operating Temp | -30°C to +60°C |
| Weight | 0.57 lbs (260g) |
| Color | Black |
Compatibility
| APX N70 | APX N70XE |
Recommended Accessories
- Motorola IMPRES 2 Single-Unit Fast Charger (PMPN4604) — Required for automated self-calibration and optimal battery health.
- Motorola Heavy-Duty Spring Belt Clip (PMLN7008) — Rugged 2.5-inch clip for secure radio mounting.
- Motorola XVP730 Remote Speaker Microphone (PMMN4142A) — Mission-critical noise-canceling RSM compatible with APX N70 series.
More Resources
- Manufacturer Data Sheet
- Accessories Catalog
- Battery Care Guide
- Atlantic Radio Blog
Frequently Asked Questions
Is the Motorola PMNN4818A battery intrinsically safe?
Yes. This battery is TIA4950 certified for use in hazardous locations when used with a compatible intrinsically safe APX N70 or N70XE radio.
Do I need to recondition this battery every month?
No. When used with an IMPRES 2 charger, the self-calibration feature manages the battery’s health automatically, removing the need for manual reconditioning cycles.
Can I use this battery with an APX N50 radio?
No. The PMNN4818A is specifically designed for the APX N70 and N70XE series and is not compatible with the APX N30 or N50 series radios.
Warranty
2-year manufacturer's warranty.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
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4.7 ★★★★★
Based on 10 reviews
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Product Reviews
★★★★★ 5
Nice for the price
I am 6’4” and 195 lbs so I need a large size for most shirts. I need it for the length, but not the width, so shirts this size tend to bow out at the back and make me feel a bit like I am wearing a tent. I prefer polos made of a very thin, breathable and moisture wicking fabric. A decent looking shirt you can wear on hot and humid days without any undershirt and stay comfortable. Old Navy makes a fantastic version, very similar to the ridiculously priced Under Armor version, and I was hopeful that this Amazon version would compare. It does, but has a few drawbacks. If this sounds like you, keep reading. If not, thanks for getting this far.
I’ll keep this brief with a list of pros and cons below. Suffice it to say, I like the polo enough not to return it, but it is still a step below some of the shirts produced by other outlets.
Cons:
1. It is far from wrinkle free, though I’m not sure it is even touted to be. It does tell me, though, that this fabric won’t be as soft as I prefer.
2. The color is a little darker (I got the coral) than it seemed in the picture, but not terribly so.
3. The “slim fit” is what drew me in and while it better than most, the back still bows out a bit
4. The fabric is clearly moisture wicking, but not the light fluffy kind. I know I’m starting to sound like a snob, but if you know what I mean, you know what I mean. Sometimes a shirt feels heavy when you sweat in it. The idea of the moisture wicking fabric is to pull that sweat away as fast as you produce it to aid in the evaporative cooling taking place on your body. This shirt doesn’t feel heavy, but I’m not sure how long it will stay that way on a really hot and humid day.
Pros:
1. Price. For $15, I can become blissfully ignorant to the cons listed above.
2. Fit. It isn’t perfect (Yes, I know this is listed as a con too), but if you have a tall, lanky body type like me, a large will fit you better than your average polo. After a trip or two through the dryer, probably even more so.
3. Convenience. Now that I know this is a good fit for me, I can try all the different colors I want from the comfort of wherever I choose to be with my phone.
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Reviewed in the United States on May 30, 2020
★★★★★ 5
2nd shirt purchased for golf team priced right slim fit comfortable
We needed golf shirts for being on the school golf team. Brand name golf clothing is extremely expensive and not worth it for a growing slim teen so our first purchase was this shirt in a different color. This is the 2nd shirt we've purchased after loving the first one. Good quality, value, and comfort. Easy wash and dry. Can be washed and thrown on a hanger to dry. No shrinkage. Perfect fit. This is a men's small that fits great on a person ~ 5' 10". The material is thin and does not hinder golf swings. Love that this shirt, and most Amazon clothing, has no brand markings. Wise marketing that Amazon's clothing is NOT labeled.
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Reviewed in the United States on May 13, 2021
★★★★★ 5
Great shirt & my son loved it.
Size: X-Large, Color: Blue
bought it for my son and he loved it. In fact when I called him he was wearing the shirt said it fit him well, it looked great. It was comfortable. He loved the quality & the cut. The length was great and ask me where I got it so I sent him the link so he could buy more in other colors. He loves to golf and said this is a perfect shirt for that. Plus the price was right.
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Reviewed in the United States on January 9, 2026
★★★★★ 5
sizing runs a bit big but very comfortable, i love these and ordered multiple colors
Size: X-Small, Color: Black
Initially, i ordered a small and an X small based on reviews here. Glad i did. I opened the x-small first and it fit perfectly. Returned the other one unopened. Sleeves fit my arms well. Collar stands up well. Shirt has sufficient length to tuck in too. Not super long though if you want to untuck with jeans.
I'm 5'6 140#. I lift weights regularly and run. I'm right at 11.8-12.0% body fat. I typically wear a small in the amazon essentials slim fit t shirt. Those fit really well in size S. Check them out too if you have not yet. These polos XS fits equally well for my body type.
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Reviewed in the United States on March 27, 2026
★★★★★ 4
Great Shirt - Fits big and isn’t slim IMO
Size: X-Small, Color: Black, Size: X-Small, Color: Black
5’10, 155lbs, size X-Small. Soft material, very comfortable, light weight and breathable. Sizing is way off. This shirt is huge considering my size, shirt size, and slim fit.
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Reviewed in the United States on January 16, 2026