I am MB from Italy.
I have just received a new battery for my MacBook 15 Pro mid 2009 (battery model A1321).
Good timing, good shipping.
The new battery frame is the same as the original but the new battery weighs 80-100 Grams less than the original (around 1/4 less). I don't know why.
Just installed, everything seems to work fine. My Battery Health software says everything is OK as it were a brand new original one.
Now I will go for some full charge-descharge cycles. If something will be wrong I will be back here.
Otherwise, great product and great service.
----------> UPDATE <----------
Unfortunately after 4 full charge/discharge cycles the battery health software tells me the battery health is at 83%: 5612 mAh VS 6800 mAh.
I know that 3rd party spare parts are not the same as originals, but almost 20% less power for a brand new battery is too much.
I am sorry but I am going to return the item.
MB
Thank you for your trust, all of our batteries were strictly check before send to customers. We will try our best to serve for you.