How Are Smart Ski Goggles Powered? Battery Design for AI Ski Goggles

Smart eyewear is moving beyond everyday photography, calls, and music. For ski and snowboard brands, the more interesting opportunity is what happens when cameras, communication, navigation, displays, and AI are built into equipment designed for all-day outdoor use.

The underlying markets are already substantial. The U.S. ski industry continues to support tens of millions of skier and snowboarder visits each season, while the National Ski Areas Association maintains detailed annual operational and guest research covering the country's ski areas. (NSAA 2025-26 industry research)

Smart eyewear is growing even faster. IDC reported that display-less smart glasses shipments increased 167% year over year in Q1 2026 to about 2.25 million units and forecasts approximately 13.6 million units for full-year 2026. (IDC Smart Glasses Market Insights)

For product teams developing smart ski goggles, snow goggles, or snowboard goggles, the challenge is no longer simply whether smart functions can be added. The harder question is how to power them without turning wearable eyewear into a bulky electronic device.

Battery Architecture Starts With Placement, Not Capacity

Battery specifications often begin with capacity: 500mAh, 1000mAh, or 2000mAh. For wearable products, however, battery location can influence the entire mechanical architecture.

A battery placed outside the optical frame provides more room for energy storage. A battery placed inside a temple or goggle frame improves integration but creates much tighter dimensional constraints. The correct approach depends on product positioning, target runtime, system load, weight distribution, and operating environment.

Two existing products illustrate these trade-offs particularly well.

REKKIE: Use an External Electronics Enclosure

REKKIE takes the more spacious route. Instead of forcing a large battery into the goggle frame, its smart snow-goggle architecture uses a separate electronics enclosure connected to the eyewear.

Regulatory documentation for the REKKIE Smart Snow Goggles international model specifies a 3.7V, 2000mAh rechargeable battery, together with Bluetooth and 915MHz wireless functions. The relatively large capacity is practical because the battery is not restricted to a narrow eyeglass temple. (REKKIE FCC technical report)

For a snow-sports product, this architecture has clear advantages. A dedicated enclosure can provide a more regular battery cavity, simplify PCB packaging, and make it easier to use a conventional rectangular pouch cell.

REKKIE's current Magnetic Smart Snow Goggles claim 15+ hours of continuous use in typical cold-weather conditions, showing why larger available battery volume can be valuable for products designed around full-day mountain use. (REKKIE Magnetic Smart Snow Goggles)

The trade-off is integration. An external module adds physical volume and concentrates some of the electronics and battery mass in one location.

For a dedicated ski product, that may be acceptable. For brands targeting a lighter, cleaner eyewear form factor, the battery has to move closer to the frame itself.

Meta Takes the Opposite Route: Put the Battery Inside the Eyewear

Meta's work on AI glasses shows what changes when the external battery enclosure disappears.

The available volume becomes dramatically smaller. Cameras, speakers, processors, antennas, hinges, and batteries all compete for space inside the eyewear structure.

Ultra-Narrow Batteries Become a Product Requirement

Meta disclosed that Oakley Meta Vanguard uses a battery in each temple arm. Its engineering team developed steel-can cells as narrow as about 7mm because conventional battery formats could not efficiently meet the dimensional and peak-power requirements of the glasses.

Meta also found that small smart-glasses batteries must support short periods of high power when several functions operate simultaneously, such as recording video while performing an AI task. Lower impedance and accurate mechanical tolerances therefore became part of the battery design requirement, not just cell capacity. (How Meta Engineered Ultra-Narrow Batteries for AI Glasses)

For an AI ski goggles startup, this is an important design lesson:

Once the battery moves inside the eyewear, its dimensions become part of the industrial design.

Width affects temple thickness. Thickness affects fit. Battery position affects center of gravity. Capacity competes directly with PCB, speaker, antenna, and optical space.

External Pack vs. Integrated Battery: There Is No Universal Best Design

The REKKIE and Meta approaches serve different product priorities.

A communication-focused pair of ski goggles may reasonably prioritize a larger external battery. Lightweight sports eyewear designed for skiing, cycling, running, and everyday use may place greater value on internal integration.

The battery decision should therefore follow the product architecture rather than a universal capacity target.

AI Features Are Making the Power Profile More Difficult

Battery volume is only one side of the problem. AI-enabled eyewear also has a more dynamic power profile than simple Bluetooth wearables.

Nowadays, snow goggles tend to combine cameras, microphones, speakers, Bluetooth, GPS, wireless intercom, a display, sensors, and AI processing. These loads do not operate continuously at the same power level.

Standby consumption may be relatively low. Video recording, radio transmission, display operation, or simultaneous AI interaction can create significantly higher loads for short periods.

This is why system-level efficiency matters. Meta reported that battery capacity in one generation of Ray-Ban Meta glasses increased from 160mAh to 210mAh, about 30%, while claimed runtime roughly doubled; the remaining improvement came from hardware and software power optimization rather than cell capacity alone. This supports a broader engineering principle: wearable runtime should be treated as a system problem, not a simple mAh problem. (Meta technical development data, summarized in its engineering publication)

For a new product team, battery evaluation should therefore include:

• Average operating current

• Peak current during camera, radio, and AI activity

• Minimum system voltage

• Target runtime by operating mode

• Battery impedance

• Power-management strategy

A larger battery cannot compensate indefinitely for an inefficient system.

Custom Battery Geometry Creates More Design Freedom

As electronics move into the frame, the remaining battery cavity becomes increasingly irregular.

A temple is long and narrow. A goggle frame may be curved. Speakers, PCBs, antennas, hinges, and optical modules can leave usable space that a standard rectangular cell cannot occupy efficiently.

This is where custom pouch-cell geometry becomes valuable.

Ultra-Narrow Cells for Temple Integration

For temple-based designs, a few millimeters of battery width can determine whether a frame remains wearable or becomes noticeably bulky.

Grepow develops custom pouch batteries for compact electronics, including ultra-narrow cells as well as ultra-thin, curved, L-shaped, C-shaped, D-shaped, and other shaped configurations. Current shaped pouch solutions can be manufactured as narrow as approximately 6mm, depending on the cell design and project requirements. (Grepow Custom Shaped Battery Solutions)

This does not mean pouch batteries should replace Meta's steel-can approach. They represent another engineering option for OEMs whose mechanical structure, capacity target, production volume, or pack architecture favors a pouch format.

Shaped Cells Can Recover Otherwise Unused Space

A custom-shaped battery does not automatically increase the intrinsic energy density of the battery chemistry.

Its advantage is space utilization.

If a PCB creates an L-shaped remaining cavity, or a goggle housing contains a curved region that a rectangular battery cannot fill, part of the enclosure volume becomes unusable for energy storage.

A shaped battery can potentially convert more of that available cavity into active cell volume.

For startups building compact eyewear, this distinction is important. The goal should not be "use an unusual battery shape." The goal should be:

Use the available product volume more efficiently without unnecessarily increasing the enclosure size.

Snow Sports: Add a Second Engineering Constraint: Low Temperature

Integrating the battery into the product solves a mechanical problem. It does not solve the environmental problem.

Snow-sports electronics operate in conditions that can be far below normal room-temperature battery test conditions.

Lithium-ion battery performance generally declines as temperature falls because ion mobility decreases and internal resistance increases. NREL notes that cold conditions reduce both available capacity and power output while also reducing charging efficiency. (NREL cold-weather lithium-ion battery analysis)

For smart ski goggles, this matters because the battery may face both low temperature and dynamic electronic loads at the same time.

A camera starts recording. A radio begins transmitting. A display activates. The processor performs an AI task.

If cell resistance has already increased due to temperature, these load peaks can cause greater voltage drop than under room-temperature conditions.

This is why brands should define a lithium battery temperature range together with the actual device load, rather than treating temperature as an isolated specification.

A Cold Weather Lithium Battery Should Be Specified Around the Real Use Case

Simply writing "-20℃ operating temperature" in a product requirement is not enough.

The battery supplier needs to know what the device must actually do at that temperature.

A practical requirement may look more like:

• Discharge at -20℃

• Maintain defined runtime under normal communication load

• Support specified peak current during camera or AI operation

• Remain above the system cutoff voltage

• Meet a defined capacity-retention target

These conditions allow cell performance to be evaluated against the real product rather than an arbitrary temperature number.

Grepow's dedicated low-temperature battery platform includes customized shaped pouch solutions. Certain low-temperature shaped cells can retain more than 80% discharge capacity at -30℃ under a 0.2C test condition, while exact performance depends on cell dimensions, discharge rate, and project requirements. (Grepow Low-Temperature Shaped Battery)

A consumer ski product may not need extreme -30℃ or -50℃ capability. The correct temperature specification should reflect the target market, whether that means resort skiing, backcountry use, alpine environments, or professional cold-weather applications.

Charging Temperature Must Be Defined Separately

One of the most common specification mistakes is treating charging and discharging temperature as the same requirement.

They are not.

Low-temperature charging introduces additional electrochemical risks. NREL identifies lithium plating on the anode as a possible failure mode during fast charging at low temperature and notes that lithium dendrites may penetrate the separator and cause an internal short circuit. (NREL Vehicle Battery Safety)

For snow goggles designed to be recharged at a ski lodge, this may be simple.

For equipment expected to charge from a power bank outdoors, the product may require temperature sensing, charging lockout logic, or another battery-management strategy.

The battery specification should therefore separate:

Discharge temperature/charge temperature/storage temperature.

Battery Development Should Begin With the Product CAD

For an established eyewear brand or a startup developing its first snowboard goggles with AI or communication functions, battery sourcing should ideally begin before the mechanical design is frozen.

Instead of sending suppliers only a target such as "3.7V, 800mAh," provide the complete engineering constraints:

• 2D or 3D battery cavity

• Maximum width and thickness

• Target capacity and runtime

• Average and peak current

• Minimum discharge temperature

• Charging temperature

• Product weight target

• PCB and antenna locations

• Wire and connector direction

• Target certification markets

The battery pack includes more than the cell itself. Tabs, wires, protection electronics, temperature sensors, insulation, connectors, and manufacturing tolerances all consume valuable internal space.

McKinsey identifies strategic partnerships as a priority for brands entering smart eyewear. Its analysis of the EssilorLuxottica–Meta collaboration emphasizes design-first constraints: the technology had to fit the required frame thickness and weight, while each partner contributed distinct eyewear and technology expertise. Battery engineering fits naturally into this product-development model. (The State of Fashion 2026 - Smart Frames)

Early battery involvement can therefore reduce mechanical redesign later in the project.

Conclusion: Design the Battery Around the Product Strategy

REKKIE and Meta demonstrate two valid ways to power intelligent snow-sports eyewear.

REKKIE uses an external electronics enclosure to create more room for battery capacity and long mountain runtime. Meta integrates ultra-narrow batteries into the temples to prioritize compactness, weight distribution, and product integration.

The next generation of smart ski goggles will likely use several architectures between these two extremes.

For brands and startups, the key decision is not whether an external or internal battery is universally better. It is whether the battery architecture matches the intended product.

As AI, cameras, displays, communication, and sensors add new electrical loads, battery development needs to address four requirements together:

usable energy, peak power, mechanical geometry, and cold-weather performance.

For compact winter wearables, standard battery selection may be enough for some products. Others will require ultra-narrow, shaped, or cold weather lithium battery solutions designed around the available enclosure and actual operating environment.

The best starting point is therefore not a battery catalog.

It is the product CAD, the power profile, and the conditions in which the device must work.