so I asked Sony Mobile about the battery capacity and replacement and stuff. I got a reply in Polish, so no screenshot
We would like to inform you that SEMC Li-Ion and Li-Polymer batteries are for a longer time marked with value of "typical" capacity. The value is based on standard methods of metering. Jt's necessary, so that demands of markets of nearly all the countries are fulfilled.
Because of the new regulations applied in 2012, the new value is introduce and it defines the "minimum" battery capacity.
We would also like to inform you, that all the batteries of this type since the change will be marked with value of "minimum" capacity (instead of "typical" capacity, which had been used before).
It doesn't influence in any way on the confirmed durations of standby time and talking time
I'm not so great in translating from Polish to English, I hope you'll understand