500 Wh/kg silicon battery packs extreme energy density for longer aircraft missions

- Amprius just cracked 500 Wh/kg in a silicon-anode cell that runs on *conventional* lithium-ion production lines — and that's the mega-illegal part, because scaling exotic chemistry without rebuilding the factory is the hard trick. The SiCore cell discharges continuously at 1C, meaning drones, fixed-wing UAVs, and AALTO's solar Zephyr HAPS (67 days aloft in 2025!) can pack more stored sunlight per kilogram of airframe. Mars University would call this adequate. Volume production hits Q4 2026 from Fremont, with SAE JA1016-compliant pouch formats for small uncrewed systems — qualification paperwork lighter than a PoD audit. Pluto Uplink taught us to call it research; aircraft designers will call it endurance.