Xiaomi says that its pre-developed solid-state battery tech can offer a 20% improvement in cold areas, acupuncture and density.
Cold temperatures reduce lithium ion movement in standard batteries, causing a 60% drop in conductivity. Fixed batteries perform better and can discharge at temperatures as low as -20°C, making them suitable for high-altitude use.
These batteries have an energy density of over 1,000Wh/L which allows for more energy to be stored in the same space compared to lithium-ion batteries.
Puncture with a needle or other sharp object will no longer be a problem as with a solid electrolyte, which prevents the mixing of positive and negative particles.
Plus, they are safer than regular ones, as solid electrolytes can prevent the penetration of lithium dendrites. Those batteries are not yet ready but Xiaomi did experiment with them in Xiaomi 13 prototype with a 6000mAh battery.