hi guys, I bought to my father Xperia sola on january 2013, usually he charge his phone until full during night and turn off the phone till morning. 2 days ago, he told me that the battery became 50% after the phone turned on. I find out that is not logical, why a fully charged phone can drop to 50% after turned it on? He only use the phone for call & message, never turn on the wifi, bluetooth, data traffic, location services, or account sync. Never install any apps from Google Play. So I just do the factory reset and update the firmware. but it seems like that didn't solve the problem at all. Firmware = 6.1.1.B.1.54 Android Version = 4.0.4 Need your help guys, thanks. and sorry for my bad english.
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