I bought my Lumia 925 in October 2013. It was running well and I used to love the battery life. However, after updating my phone to Windows Phone 8.1 I started having problems with battery life. Earlier I used to charge only once in 24 hours, but after upgrading I had to charge it at least twice every 24 hours for it to run smoothly. I also found a strange bug: even if I don't put it on charge, the battery sign shows that it's charging. I've never used a wireless charger.
In October 2014, all of a sudden I found it that it doesn't charge at all. I've had it repaired twice, and although the charging problem was temporarily fixed, battery life remained the same. Worse, a few days later it stopped charging again.
What should I do? Should I have the phone repaired again? If so, what should I tell them to change internally (maybe the battery)? Or should I simply throw it away?