The Problem: That Sinking Feeling When the Power Dies

Sodium Flashlight

When your battery dies in deep winter, it’s more than an inconvenience. It’s a moment of real vulnerability. Whether you’re stuck in a snowed-in town or pulled over on a frozen highway, the last thing you need is for your flashlight to fail too.

Conventional flashlights use lithium-ion batteries that weren’t made for the cold. They slow down, dim out, and eventually shut off completely.
We fixed that.

Coming Soon

Kickstarter Indiegogo

The Solution

Built for Winter. Powered by Sodium-Ion.

We asked a simple question: What if a flashlight was designed with one goal in mind, working flawlessly in the cold? Not as a feature, but as its core purpose. The result is Sodiumfrostglow.

Performance at -40°C

While lithium fails below -20°C, our sodium-ion cells deliver stable, full-power output at -40°C. A fundamental shift in winter reliability.

3,000 Charge Cycles

Engineered for the long haul. Used regularly for over a decade before significant capacity loss. A permanent part of your safety kit.

Zero-Voltage Recovery

Forget battery anxiety. Our cells can be safely recharged from 0%, even after being stored fully discharged for extended periods.

Feature 01

Your Family's Power Reserve: 10,000mAh

During a blackout, it's more than a light. It's a mobile power station that can illuminate a room for an entire night and still have enough power to keep your phone alive.

Feature 02

2500 Lumen Adjustable Beam

From a focused spot to check the fuse box in the basement to a wide flood to light up the living room—all with a simple, intuitive slide zoom.

Feature 03

Honest Durability & Precision Body

We built Sodiumfrostglow with robust T6063 aluminum alloy and IP44 splash resistance to confidently handle household drops, snowy walks, and life in your car. Lightweight. Solid. Built to last.

3rd Party Certification: The Cold, Hard Facts

We believe that exceptional claims demand solid proof. We submitted our sodium-ion cells to independent labs under strict IEC standards (Report No.: E-NJ24090069A0).

Our Commitment to Transparency

Data Verifiability

Every figure in our charts is authentic, extracted from a complete third-party test report.

Future Verification

Production batches will be sent to a leading North American outdoor-gear testing institute for public evaluation.

Technical Specifications

Battery Technology	Rechargeable Sodium-Ion
Battery Capacity	10,000 mAh
Max Luminous Flux	2,500 lumens
Max Beam Distance	240 m
Operating Temperature	–40 °C to +50 °C (ambient)
Protection Rating	IP44 (splash & dust resistant)
Body Material	T6063 aluminum alloy, hard-anodized
Charging Interface	Input (Type-C): 5V / 2A Max Output (USB-A): 5V / 1A (5W)
Dimensions & Weight	271 mm × 51 mm × 38 mm \| 640 g (with battery)
Runtime	24 h (eco) / 5 h (turbo)
Functions	Slide zoom, power-display, 5-mode (High-Med-Low-Strobe-SOS), power-bank

Common questions are here.

FAQ

My high-end lithium flashlights always die in winter. What's the REAL difference with your sodium-ion light at -40°C?

It's a fundamental difference, not an incremental improvement. Lithium-ion activity plummets in the cold—it essentially "freezes," leading to a catastrophic drop in voltage and capacity. Sodium ions, due to their chemical properties, maintain high mobility even at extreme low temperatures. Simply put: at -40°C, lithium is struggling to survive, while our sodium battery is operating normally. All our performance data is based on stable output in real-world cold environments, not just ideal lab conditions.

Sodium-ion sounds new. Is this technology reliable and safe?

It is highly reliable and inherently safer than lithium. The sodium-ion chemistry offers superior thermal stability, meaning it carries an extremely low risk of thermal runaway (fire or explosion), even under extreme abuse like puncturing or short-circuiting. Furthermore, it boasts a very long cycle life (3,000 cycles), enough to last you through countless winters and summers. You are investing in a well-proven, mature technology built for reliability.

The 10,000mAh capacity sounds great, but what does that mean in practical use?

It means absolute runtime freedom. For example: • At a medium setting (~500 lumens, enough to light up a campsite), it can run for over 10 hours. • At a low setting (perfect for reading in a tent), it can provide light for multiple nights. • Crucially, in an emergency, it acts as a high-capacity power bank, capable of fully charging your phone or GPS device 1-2 times. It's the energy core of your emergency kit.

Some flashlights claim 4,000 or more lumens. Why only 2,500 for yours? Is the zoom feature actually useful?

We prioritize "honest, usable brightness" over marketing gimmicks. Many ultra-high lumen figures are short-term "turbo" peaks that last only seconds before stepping down due to heat. Our 2,500 lumens is a sustained high output, optimized for stable, long-term use with effective thermal management. The zoom is critically useful. It effectively gives you "two flashlights in one": a long-range spotlight to pierce hundreds of meters of darkness for search or navigation, and a wide, even floodlight to illuminate your entire immediate area for close-up tasks, camping, or repairs without harsh hotspots.

Can I replace the battery?

Yes. We designed it with a user-replaceable, standard-sized sodium-ion battery. You can purchase spares in our "Add-Ons" section for backup. We believe a true professional tool should offer maximum flexibility.

I'm tough on my gear. Can this flashlight handle drops and weather?

Absolutely. It's built for it. • The body uses a robust aluminum alloy with good impact resistance. • It features an IP44 rating, effectively protecting it against everyday splashing water, rain, and snow. • All joints are fitted with sealing gaskets to ensure fundamental weatherproof integrity.

What is the flashlight's weight?

The total weight is 640 grams. This is largely due to the massive 10,000mAh sodium-ion battery inside, which accounts for about 40% of the total weight. We firmly believe that for anyone relying on their light in severe cold, 'running out of power' is far more dangerous than 'carrying a few hundred extra grams.'

What is the color temperature (CCT) of the LED?

The Sodiumfrostglow features a high-power 25W round-die LED with a Cool White color temperature of 6000K-8000K. We specifically chose this cooler spectrum to maximize raw lumen output and efficiency, ensuring the brightest possible beam for emergency signaling and visibility in pitch-black winter conditions.

Can I leave this flashlight in my car year-round (Extreme Cold & Summer Heat)?

Yes, absolutely. This is the exact scenario Sodiumfrostglow was designed for. • In Winter (-40°C): Unlike Lithium-Ion batteries that can freeze or lose capacity permanently, our Sodium-Ion cell remains stable and ready to fire even after months in a freezing trunk. • In Summer (High Heat): Sodium-Ion chemistry has superior thermal stability compared to Lithium-Ion. It has a much higher threshold for thermal runaway, making it significantly safer to store in a hot vehicle without the fire risks associated with standard lithium batteries. It is engineered to be a true "set and forget" emergency tool.

How long does it last at -40°C?

In our latest lab test (Nov 2025), the unit ran continuously for over 9 hours at -40°C without fully depleting the battery.

Will the zoom lens freeze shut if it gets wet?

We tested a "Freeze-Thaw-Refreeze" cycle (-40°C). While frozen condensation can cause slight initial resistance, the mechanism is designed to "break free" with a firm pull and resume normal operation. It does not permanently seize.

Support & Warranty

18-Month Warranty We stand behind our craftsmanship, covering manufacturing and material defects to ensure your investment is protected.
North American Support Core team based in NA for seamless, time-zone-friendly customer service. Fast and professional solutions.
Global Shipping Carefully arranged logistics for numerous regions worldwide.

About Us: Forged by -40°C

We didn't just read about the cold; we lived it. As two founders who endured the brutal winters of Saskatoon, Canada, we know the feeling firsthand: the sting of -40°C air, the howling winds, and the profound silence when your last piece of gear fails in the dark.

This became our obsession. We saw the need for dependable energy and the limits of existing solutions. So we turned to sodium-ion technology—a power source that defies the cold and respects our planet. Sodiumfrostglow was born to bring unwavering light to the world's iciest corners.