I bought this battery, so to speak as a second battery, because I love to take pictures and do not want to stand on one without battery in the middle of nowhere. My original Olympus battery is already weaker slowly and is therefore relatively quickly. Meanwhile, however, I take the Hama battery her permanently and have the case of Olympus as a substitute. The battery of Hama holds loose three or four days by when talking about repeatedly Photos (z. B. Public Services), mainly without flash, shooting the day. I would buy it again and again!