The U.S. Department of War announced a $75 million grant to Amprius Technologies, a California‑based maker of high‑energy‑density lithium‑ion cells, to repurpose an existing EV‑battery fab for military‑drone applications. The award, detailed in a release on 5 October, will fund the conversion of Amprius’s 30 mm‑wide cylindrical cell line—originally optimized for electric‑vehicle packs—into a production line capable of delivering 300 Wh/kg pouch cells tailored for unmanned aerial systems (UAS).

Amprius’s “Silicon‑Nanowire” anode technology, which replaces conventional graphite, is the core of the grant. The cells can store up to 500 Wh per kilogram in laboratory tests, a figure that would extend drone flight times by 30‑40 % compared with today’s lithium‑polymer packs. The Department of War’s contract stipulates an initial production capacity of 5 GWh per year, enough to equip roughly 10,000 medium‑size drones with 2‑kWh battery modules each.

The move reflects a broader trend of defense agencies leveraging commercial EV‑battery advances to accelerate autonomous‑system capabilities. By tapping a civilian fab, the DoD avoids the long lead times associated with building a dedicated aerospace battery plant, while also providing Amprius with a guaranteed revenue stream that could fund further R&D into solid‑state and lithium‑sulfur chemistries.

Industry analysts see the grant as a signal that high‑energy‑density cells will become a strategic asset beyond passenger vehicles. “If the DoD can demonstrate a clear performance edge for drones, we’ll likely see similar contracts for high‑power maritime and ground‑based platforms,” notes battery‑sector consultant Dr. Lina Chen of Battery Insights. The partnership also raises questions about supply‑chain security, as the same silicon‑nanowire technology is being pursued by several Asian manufacturers for next‑generation EVs.

Overall, the $75 M infusion accelerates the convergence of civilian EV battery manufacturing and military aerospace needs, potentially shortening the timeline for commercial solid‑state batteries while expanding the market for high‑energy‑density lithium‑ion cells. Electrek

On 29 September BYD unveiled a concept sedan that pairs avant‑garde coach doors with the company’s first production‑ready solid‑state battery (SSB). The vehicle, displayed at a private showcase in Shenzhen, is intended to signal BYD’s ambition to move solid‑state technology from the lab to premium‑segment production by 2027.

The solid‑state pack uses a sulfide‑based electrolyte and a lithium‑metal anode, delivering an estimated 420 Wh/kg—roughly 20 % higher energy density than BYD’s best‑in‑class lithium‑iron‑phosphate (LFP) cells. The 90 kWh pack is claimed to provide a 600 km (WLTP) range while supporting a 0‑100 km/h sprint in under 4 seconds, figures that rival current high‑performance EVs that rely on liquid‑electrolyte chemistries.

Key technical highlights include a 0‑pressure cell design that eliminates the need for liquid cooling, reducing pack weight by 12 % and simplifying thermal‑management hardware. BYD also announced a modular “stack‑and‑swap” architecture that could enable rapid replacement of degraded modules, a feature that could address one of the long‑standing concerns about solid‑state durability.

The concept’s interior showcases a 15‑inch curved OLED display and a biometric cabin‑access system, but BYD emphasized that the battery is the headline technology. “Our solid‑state cells are the result of five years of iterative scaling, and this sedan is the first vehicle where we can guarantee both safety and performance at a volume‑manufacturing level,” said Wang Chuanfu, BYD’s founder, during the briefing.

Analysts caution that solid‑state commercialization still faces hurdles—particularly in large‑format cell uniformity and cost. However, BYD’s vertical integration, which spans raw‑material sourcing to cell assembly, could give it a cost advantage over rivals that rely on external SSB partners. If BYD can achieve a $150/kWh price point for the solid‑state pack, it would make premium EVs more affordable and could accelerate broader adoption of the technology across mid‑range models.

The unveiling underscores China’s aggressive push to lead the next battery generation, positioning BYD as a potential challenger to Japanese and Korean SSB developers. Electrek

A fresh update from Electrek on 5 October catalogues six home‑energy storage systems that rival the Tesla Powerwall in capacity, chemistry, or price. The surge in alternatives reflects mounting consumer demand for resilient, behind‑the‑meter power as extreme weather events become more frequent and data‑center operators seek on‑site backup.

1. LG ESS Home – A 13.5 kWh lithium‑iron‑phosphate (LFP) unit priced at $9,800, offering a 10‑year warranty and a fully modular design that can be stacked for up to 40 kWh.
2. Sonnen Eco L – German‑made LFP with a 10 kWh capacity, integrated inverter, and a subscription‑based “SonnenCommunity” that allows owners to sell excess energy back to the grid.
3. Enphase Encharge 10 – A 10.1 kWh LFP system that pairs with Enphase micro‑inverters, enabling seamless integration with existing solar arrays and providing a 25‑year warranty on the battery cells.
4. Blue Planet Energy Blue Ion – A 12 kWh lithium‑nickel‑manganese‑cobalt (NMC) pack that claims a 95 % round‑trip efficiency and a “smart‑stack” algorithm for load‑shifting.
5. Pika Energy Pika‑Power – A hybrid system combining a 9 kWh LFP battery with a 5 kW inverter, marketed for “grid‑independent” off‑grid cabins and remote sites.
6. Generac PWRcell – A 17.1 kWh LFP solution that integrates a whole‑home inverter, targeting homeowners who need both backup and load‑management capabilities.

Collectively these products span price points from $7,500 to $12,500, narrowing the cost gap with the Powerwall’s $10,500 list price. Notably, three of the six (LG, Sonnen, Enphase) use LFP chemistry, which offers superior thermal stability and longer cycle life—attributes that have become selling points after several high‑profile thermal‑runaway incidents in 2025.

The market diversification is also driven by policy incentives. The U.S. Inflation Reduction Act’s tax credit for residential storage now applies to systems up to 20 kWh, encouraging manufacturers to release larger‑capacity models. Meanwhile, European nations such as Germany and France have introduced subsidies for “smart‑grid‑ready” batteries, prompting companies like Sonnen to emphasize their community‑energy platform.

For the battery industry, the proliferation of home‑storage options signals a shift from a Tesla‑centric ecosystem to a more competitive landscape where cell chemistry, warranty terms, and software integration become differentiators. As manufacturers scale LFP production for both EVs and stationary storage, economies of scale are expected to drive down costs further, potentially making multi‑megawatt residential storage a mainstream reality within the next five years. Electrek

Quick News

• Suzuki launches $13,500 e‑SKY kei car using BYD’s 30 kWh lithium‑ion pack – The Japanese automaker’s new ultra‑affordable electric micro‑car relies on a BYD‑supplied battery, undercutting domestic rivals on price. Electrek
• Tesla Q3 deliveries beat forecasts but BYD’s BEV sales surge ahead – Tesla shipped 420,000 vehicles in Q3, surpassing expectations, yet BYD sold 1.2 million BEVs, widening its lead in the global market. CnEVPost