The use with the Canon EOS 50D works thanks to the perfect fit properly. The term of the Ansmann Batteries IAT compared to Canon Original Battery slightly lower. However, in view of the significantly lower price is not a disadvantage, because the shorter term can be offset by the purchase of another Ansmann batteries. The full capacity of the battery has received after the third charge and discharge and is working perfectly ever since.
For me, the Ansmann battery as a good, inexpensive alternative to the original and is in my view, to know about.