Since my original batteries are too expensive for my Canon 40D, I have again a Bought Ansmann Battery. The first Ansmann I had worried already 4 years ago and was quite satisfied ... slowly weakened this, however, and brought it in spite of a full charge only on 60-80 trips. In short, a new was needed! And with the price and the expected life seemed to me the purchase of a good Ansmannakkus To be an alternative to the original Canon. So my recommendation!