Battery is discharging fast

[Elfride]

Mi Xperia Xz se Descarga muy rápido al 100% la batería dura 7 horas

My Xperia Z is discharging very fast at 100% battery lasts 7 hours

GT

[Uliwooly]

@Elfride

Since the Xperia Z was released in 2013 the battery can't retain the charge as good as before.