Chinese researchers have developed a high-energy lithium-metal primary battery that combines long endurance with powerful bursts while operating at temperatures as low as -40°F (-40°C). According to Chinese online media reports, validation tests showed that the battery achieved an energy density exceeding 750Wh/kg at a low discharge rate. High-energy battery The new lithium-metal primary battery is designed to combine high energy density, long storage life and rapid power delivery, while continuing to operate reliably in temperatures as low as -40°F. The researchers developed a 25Ah pouch-type lithium-metal primary battery that achieved an energy density of more than 750Wh/kg under low-rate discharge conditions, according to Science and Technology Daily. At -40°F, it retained an energy density of 447Wh/kg when discharged at 1C.