The Buffalo-based battery materials company debuts NDAA-compliant pouch cells with up to 80% more energy density than standard Li-ion.
Natrion has launched defense-optimized battery cells for uncrewed systems including drones, surface and underwater vessels, ground vehicles, and humanoids. The Buffalo, New York-based company announced the new product lines on May 14, 2026. The cells deliver nearly 80% more energy density than available Li-ion alternatives.
The new lines, called Cirrus and Stratus, build on Natrion’s longstanding work with the U.S. Air Force and Navy. Both branches have awarded the company multiple contracts since its inception.
Cirrus and Stratus Reshape the Attritable Drone Battery
Cirrus uses an anode-free architecture, and Stratus uses lithium-metal. Both rely on Natrion’s proprietary Active Separator material.
The pouch cells are dimensionally equivalent to existing battery packs built from 21700-type Li-ion cylindrical cells. That means Cirrus and Stratus packs can drop into virtually any system with the same form factor.
Operators gain up to 80% more energy capacity with virtually no added weight. Standard Li-ion cells top out at roughly 250 to 280 watt-hours per kilogram. Natrion’s anode-free cells exceed 450 Wh/kg.
The cells deliver 100 to 250-plus charge-discharge cycles. That lifespan fits attritable, high-performance platforms where survivability and replacement cost both matter.
“The defense sector in particular desperately needs better-performing, US-made battery cells that are right-sized and optimized for these applications,” said Alex Kosyakov, cofounder and CEO at Natrion. “Despite their vastly different requirements, current military systems have long been forced to rely on one-size-fits-all lithium-ion batteries that increase battery costs and waste precious rare minerals, while being poorly optimized for their mission. It’s a lose-lose. Today, we’re fixing that: creating mission-optimized battery cells at a dramatically lower price point, with better endurance and capability, reduced reliance on rare minerals, and manufactured on American soil.”
Open-Air Manufacturing Cuts Cost and Aging Time
Standard Li-ion cells are typically assembled in specialized dry rooms with precise humidity control. Cells can then take weeks of aging before shipment.
Natrion designed Cirrus for low-cost, open-air assembly with standard equipment. The cells require less than two days of aging.
The cells are certifiable to NDAA Section 842 supply chain requirements. Natrion is shipping samples for user testing today.
“Higher-energy density Li-ion cells exist, but the tradeoff for performance is often much higher cost,” said Philip Lee, Natrion’s VP of Business Development for Asia-Pacific and a former naval aviator in the Republic of Korea Navy. “Attritable uncrewed systems need inexpensive power sources that are readily replaceable with robust, local production supply chains, in addition to being very high in energy density. That is what we are offering with Cirrus and Stratus.”
“This dramatically lowers capital and operational costs, allowing us to replace batteries at unprecedented rates. The improved energy density enables extended duration and new mission capabilities that Li-ion simply can’t match,” Lee added.
Natrion’s existing high-volume Active Separator manufacturing line in Buffalo accelerates the rollout. The company partners with the U.S. Department of Defense, LG Energy Solution, and leading research institutions.
More information is available at Natrion.
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