Hi, I bought the battery with a clear conscience, because my old just kept 10hrs. After receiving the goods, the eintraff late, and fully charged. What a miracle the new hold as long as the old. After several letters from the seller got from Amazon provided a warranty claim because the seller has not responded to email's. Only then wrote the salesman that I should send the batteries back so that he can check it. CONCLUSION: I sent the battery 1.5 months back. So far, no sign by the seller. The warranty claim is worde very ship quickly from Amazon.