Xiaomi has expanded its battery upgrade programme for select older smartphones in China. Instead of limiting larger batteries to newer smartphones, the company is now offering existing users a way to extend the lifespan of their phones with upgraded battery packs. Consequently, Xiaomi 13, Xiaomi 13 Pro, and Xiaomi 13 Ultra users are eligible for higher-capacity batter…​Xiaomi has expanded its battery upgrade programme for select older smartphones in China. Instead of limiting larger batteries to newer smartphones, the company is now offering existing users a way to extend the lifespan of their phones with upgraded battery packs. Consequently, Xiaomi 13, Xiaomi 13 Pro, and Xiaomi 13 Ultra users are eligible for higher-capacity batter…  ​ mobiles