Question about Sony NP-FW50 battery

Ordered 2 pieces 3 weeks ago - both black 1020mAh.

I received the black one (China, 1020mAh) with my last order (end of 2014); however, exactly the same one was included with the camera itself, so I didn't think much of it until now. I'm curious to see how long the battery lasts - so far it hasn't caused any problems.

It seems that the black batteries with 1020mAh are included with the new "smaller" models. All A7 and A7II models come with the grey ones with 1080mAh. Since I own two of each type, I can agree with the reports: especially in an energy-hungry A7II, the difference is clearly noticeable in use; the black batteries last much shorter. As of today, 1080mAh are specified here in the shop and a "black model" thus does not correspond to the advertised item.
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