The battery for the Samsung S 2 was delivered very quickly. After a few weeks of operation, I prefer to the battery the following conclusion: A well-functioning, recommendable battery. No overheating or similar problems. A deduction of points there, because the battery basically in charge indicating vpller 1650 mAh, but has never reached the announced 1900 mAh. Unfortunately, this is quite in Batteries usual. I would buy this battery anytime.