Amprius Technologie, a developer of ultra-high energy density lithium-ion batteries with its Silicon Nanowire Anode Platform, announced that an independent third-party testing lab has validated Amprius’ 390 Wh/kg polymer electrolyte cell by successfully passing the nail penetration test per the requirements of section 4.7.4.4. of the MIL-PRF-32383 (Military Performance Specification)....