Battery Draining after replacement

[Sunmok]

Hi,

I replaced the battery on 29th January 2018. Phone worked fibe for 3 days with longer battery life, but then it started draining.. Now full charge shows only 12 hours of life whereas earlier it used to be 18 to 20 hours on full charge.

 What could be the issue of draining this fast with new battery. 

Please help.

Regards 

Sunil Joshi 

[dandy63]

Did you replace it with a genuine Sony battery or an alternative ..... 

[Sunmok]

Genuine.  Had given to authorised sony mobile service center for replacing battery. I guess sony service center sells genuine parts right ..