Text of the first review March 2012:
It's the big question is how the battery works in one year. Now, after a few weeks, I'm thrilled. Significantly shorter charging time as the original, and he also holds three times as long. It is the purchase price of Siemens Gigaseit SL 78 H outrageous by the manufacturer as the original - Battery "not" work. After 2 years the original is - battery to use only a few hours. Many other reviews I could see the same defect. False economy if that does the brand image of Siemens well, I doubt it. This exchange - battery is working properly. He does not get hot and I have found no other faults. I seem to have found that the voice quality has improved. Perhaps the transmit power is positively influenced? I do not know - is also not been decisive. I speak here from a strong buy recommendation!