The batteries are ok for me. Maybe charge them fully and then use them up and see how long they last. Maybe the discharge is not the same as with the Sonys.
This is the Permium series from Patona. That's right. They are almost as good as the Sony batteries and are much more profitable than the normal (yellow, 950mAh) version!
I'm also a bit shocked, as I have the larger mAh myself. It's really only 950mAh. Well, it should be just enough.
Besides, the original Sony ones last about 10% longer than the 1000 mAH Patona.