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Aamir Siddiqui / Android Authority TL;DR A paid battery upgrade program lets users of the Xiaomi 13 series swap in higher-capacity batteries, with gains of 500mAh to 541mAh depending on the model. The service costs 189 RMB (~$28) and is expected to be limited, with Xiaomi urging interested users to act quickly. The upgrade comes … Read More “This brand offers real battery upgrades for older phones” »