Suddenly Power gone

[AkDts]

I bought Sony Xperia E1 dual phone yesterday,if i not use more than 20 or 30 minutes phone automatically power gone.then i go to power on the phone again, I had remove and re-fix the battery and press the power button.

How can i recover that issue?????

[Hampus]

Hi and welcome to the community! Since you're new please be sure that you have checked out our Discussion guidelines.

Do you mean that the battery goes flat or that the phone powers off by itself? If the phone powers off by itself, I suggest that you perform a software repair on your phone via PC Companion to exclude software related problems:
http://www.sonymobile.com/global-en/tools/pc-companion/

In PC Companion you press start on Support Zone > Start on Update the phone/tablet software > Repair phone/tablet (the blue clickable link in the message) > Follow these steps without having your device connected to the PC.

Follow the instruction that appears in the program and do not connect your device until this guide tells you how to connect it.