Share your experience!
My girlfriend and I are having the same problem. She has xperia v and I have Xperia z1.
Do you charge it via USB or wall socket?
I charge it via wall socket with the siny charger which came with my mobile..
Hopefully it gets solved in the next firmware..
Then how many hours u charge your phone and with which charger??
I do not have the M,but charging depends on the output of the adapter.Look on the adapter and tell me the output.