The battery is non-removable, which kind of sucks.
I've had my phone for about a year now.
I've read about this Sudden Death thing happening to the Xperia Z phones after the new software update, I don't know how true that is.
Apparently Sony has released a software update which MIGHT fix Sudden Death, but the thing is, because my phone is dead, PC Companion (updates your phone) won't detect my phone for update! So how can that even be possible?
Two days ago, my Xperia Z was on 1% battery, so I put it on charge. A few hours later, I go back to my phone, which had now turned off. I couldn't turn it back on, and I've also tried all the reset/hard reset ways. I left it on charge a bit longer (which all in all turned out to be 11 hours), still no success of turning it on. I took the charger out, then put it back in, which resulted in the red indicator light to come on (not flashing) for a minute, then switch off. But I still couldn't turn it on.