Yes, I was looking forward to an original Samsung battery for my Galaxy S2. After all, I already had very bad experiences with a few 'compatible' copies. And that's why I wasn't looking for the cheapest battery, but the most expensive one... But the result was disappointing. Without intensive use, the fully charged battery had already lost 50% of its power after half a day. I complained to Coolblue and behold... I was heard. Without having to return the battery, I received a new one after two days... I thought that was a more than excellent service. And yet... this new copy is really not of a higher quality... Too bad! I let Coolblue know, stating that both batteries have an expiry date that has been passed for some time. One even dates from December 2013... Perhaps this is the reason why the 'power' of the batteries has dropped significantly? I didn't get an answer from Coolblue anymore, until I finally got the invitation to express my opinion. Thanks for that!!!