Sony quick charger charging time

[Yongliang]

Hi guys, I'm currently the Sony 1hr quick charger.
It states that it will take abt 205 min to charger x4 AA batt
at output 575mah.
However, I've tried x4 GP 1600mah batt and the charger will cut off abt 100min a few days ago.
Just now, I used it to charge x4 new Sanyo 1850mah batt n the same thing happened.
Isnt it time-based and isnt 100min the time taken to charge only x2 batt?
Any Sony charger user experience the same thing?

 

[kylelam77]

i use it to charge 1700mah batt. 4 of them takes me around 3 hours. It takes less for 2 batts. No discrepancies so far.....

 

[Yongliang]

I juz fully charged 4x GP 1600 mah last nite.
This morning, I tried to charge them again and amazingly, the Sony quick charger cut off abt 40 min later....
What I feel is that this Sony charger is more than a time-based charger.