Weird battery issue.

[Mr_SndMn]

Hi.

I have a problem with the my Xperia SP its acting normally but the thing is that whenever i try to switch it off and on again my phone suddenly claims its battery is completely drained even though i had it at least at 70% before the restart. I thought it was the firmware issue so i waited for an update to android 4.3 but it got worse because now it shuts down immediatly after it reaches the home screen still claiming that the battery is empty. 

I searched for this kind of problem on the internet but i didnt find anything maybe someone knows what might be wrong.

[blackbox]

Try reinstalling the firmware with SUS + factory reset. Backup your data first!

[_alexdon_]

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@blackbox wrote:

Try reinstalling the firmware with SUS + factory reset. Backup your data first!

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http://www.sonymobile.com/gb/tools/update-service/

[3xperia]

Maybe the battery is already broken. I used to have a phone that I sometime left it on charging for like 8-10 hours. That habit broke the battery. Even though it said 100% level, but I just able to used the phone for about 30 minutes to an hour.

[Mr_SndMn]

If the battery has been damaged will it void my warranty ? If it does what is the cost range of the battery repair/replace, i want to know before i give it to repair.

[_alexdon_]

If you contact xperia care,they will inform you:

http://www.sonymobile.com/global-en/support/contact-us/