i bought a new battery

[kabsha]

I swear I bought a new battery for my Sony xperia lt29i when I was experiencing the same problem But immediately it reached 39% it went to 0% then it shut down Sony help us

[Uliwooly]

@kabsha

I'm not sure if the Xperia Ion is still supported by XC but if it does, repair the phone with XC 

Xperia Companion (XC)

Software Repair Guide

Alternatives on How to backup Xperias

http://talk.sonymobile.com/thread/36355