I ordered the battery for my Siemens Gigaset 78H. The battery pack has not specified AMAZON 950 mAh, it is only 830 mAh. However, this does not constitute a significant reduction in performance. It should only advertising and reality coincide. Since I had such a battery before I can make a statement about the durability. He held me barely 2 years. The original batteries from Siemens were for 5 years in operation, or in some phones are now functional even after 7 years. However, considering the 4 to 5 times the price of genuine batteries, so you can get over the shorter lifespan. Process the order super.