Phone turns off by itself

[Familyman]

Hi,

I have recently been having a couple of problems with my z5.  The phone turns off randomly.. If I try to turn it back on shows the red battery symbol on screen and won't turn on. Currently the only way to turn it back on is to plug it in and then turn on.   It will then power up and says I have plenty of battery, I can then remove from the power lead. Happened today again and when I plugged it in and turned it back on said it still had 74% battery. Is this a battery error? 

[Rocky73]

my phone is turning off by itslef and when i charge the battery wont go above 20% . please tell me some easy solution and im from Pakistan where i belive we dont have any authorized sony service centre. please help me i love sony mobiles but in pain these days, reg

[Lent2019]

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@Rocky73 wrote:

my phone is turning off by itslef and when i charge the battery wont go above 20% . please tell me some easy solution and im from Pakistan where i belive we dont have any authorized sony service centre. please help me i love sony mobiles but in pain these days, reg

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Are you familiar with Accubattery app?  It gies you Estimated capacity. In case you have a battery issue.

I'm about the write up something on battery as recently it has really annoyed me.