Original S3 battery, some one has tested how long it can stand? Original one has a good performance if don't care about the capacity in general, but capacity is the most important. This pisen battery is quite well in performance as original battery with same 2100mAh capacity. Samsung Galaxy S3 Battery, (PISEN) Lithium-ion Battery for Samsung Galaxy S3 i9300 - TinyDeal
Got it and make a test, hope this perform well.