I have had my Fairphone 2 for two years next month.
For the last few weeks, I have noticed that my battery runs out very fast indeed. On a typical day, I use the phone for half an hour or so in the morning (Spotify and news apps & Twitter) and then it sits on my desk during the working day. I will check it for up to half an hour over that period, so it is really not being used that much.
However, when I leave work at 16:00 the battery is usually down to 30 percent. I hibernate apps and have GPS localisation off.
Is it time for a new battery? I have also had a couple of occasions where the phone would not charge even with several different chargers, but this seemed to resolve itself.
Looking forward to some feedback