Xperia V does not work with a new battery

sony.user

New member
Sep 21, 2016
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Hi.

I bought on eBay a new battery. My smartphone works only if it is connected to the charger. Without charging smartphone is turned off immediately and not able to turn on: youtu.be/xiAn9_B4V1U :(.

What does it mean? Faulty battery or something else?
Thank you.