For little money here you get identical performance as the original battery. These were after 4 years "finished" - ie there was barely keep charge and the battery was empty flux again. These no-name batteries deliver the same power since 2 months. For long-term effect, I can not say anything yet, but even if they keep only 2 years, they have the money compared to the overpriced originals (6 times price) absolute value. Comparisons with the pricing policy in ink cartridges come to mind. Here Mr. and Mrs. Siemens could rework times. :-) My advice for you!
