2400mAh? I do not laugh!

This battery is said to have 300mAh more capacity than the standard battery. A friend and I have ordered us each a. Both batteries make much earlier flabby than the standard battery of Samsung. Normally, I charge my S3 after 14h, depending on the usage time 1-2h sooner or later. The battery of PolarCell makes the latest limp after 10-12h.
We tested the batteries in normal daily operation for a week because I thought at first, "this can not be, 300mAh seek more power and 2-4h earlier I have to a power outlet!", These values ​​retreated in both a battery But how red thread through the whole week, regardless of whether the weekend, or at work.
If I could, I would give no star!

My opinion: Stay away!