Already, I thought the Xperia Z charger felt weird. It stated 1.5 amps as the maximum output amperage. Also, for that amperage the phone seems to charge quite slow, especially when compared with four other USB charges, of 1 and 2.1 amps.
So, tonight I decided to take a multimeter to the charger(with my USB breakout cable) and the voltage measured just 4.90 volts(measured using a high quality multimeter). I was just wondering if someone else on this forum could take their charger (EP880 or your regional variant) and check their voltages, as a voltage below 5v seems quite unusual on USB spec chargers, and it seems odd that Sony would design a charger that would raise the voltage under load.
So, tonight I decided to take a multimeter to the charger(with my USB breakout cable) and the voltage measured just 4.90 volts(measured using a high quality multimeter). I was just wondering if someone else on this forum could take their charger (EP880 or your regional variant) and check their voltages, as a voltage below 5v seems quite unusual on USB spec chargers, and it seems odd that Sony would design a charger that would raise the voltage under load.