I generally use my samsung galaxy tab charger with my z2 because the Sony's 1500mah charger is very slow. An old htc 1a charger is faster than Sony's charger using Sony's usb cable.
Using the samsung official 5v 2a charger with a cheap magnetic 2 meter cable provides around 1300mah. Charge voltage starts around 4.1 rising to 5v slowly. 2 hours will achieve near 80% at 1% every 1 minute 29 seconds. Nearer to the end of charge the rate and voltage decreases, so it's slow charged at that point until full.
I haven't recorded the figures but the phone is accepting higher charge current, so I try to find a good balance to avoid too much heat. A higher quality magnetic cable will likely be faster but may also generate more heat, but not much problem on cold winter desks or surfaces.
If Sony wanted quick charge they would have an official charger, for now they aren't bothered.
It would be good to know the official figures and charger, rate etc using the z3. Is it still a 1.5a charger?
Sent from my D6503 using XDA Free mobile app
Sent from my D6633 using XDA Free mobile app