Charging Slowed Dramatically

[5M177Y]

I plugged my Xperia Go into the mains charger last night, to charge over night, as I often do. As you can see from the screen shot, it started charging as expected (from last dip on the graph), but then at some point the charging almost leveled out, and so was not fully charged after being plugged in for 8 hours. What is the likey cause of this? I have this morning connected the phone to my computer, and it seems to be charging at a normal rate. Could a faulty charger cause this behaviour?

[5M177Y]

Update: The phone reached full charge when connect to computer, however the charge seems to be falling rapidly and from full charge it is estimating 9 minutes of battery life.

[MarlonUk1]

the time indicated on the battery use is the time elapsed after the last full charge, it doesn't tell you how much time is remaining, you can see your battery level on about phone>status

[5M177Y]

Sorry for the very late reply, I got locked out of my account and it's taken this long for support to get me back in.

Anyway, I still have problems with the phone not charging fully, but I have found that letting the battery completly run down can help.