We reviewed the Sony Xperia X Compact recently, but due to time constraints we couldn't finish the battery testing procedure in time for the publication date. Well, we're done now, and the results are in. First off, though - some preliminary numbers. The Xperia X Compact is powered by a 2,700mAh battery, which is the same capacity as the one fitted in the Z5 Compact. The Xperia X proper, meanwhile, packs a marginally smaller 2,620mAh battery, while the Xperia XA manages with even less - 2,300mAh. In our proprietary test routine the X Compact posted very good scores overall,...
Source: http://www.gsmarena.com/sony_xperia_x_compact_battery_life_test-news-20636.php