After 1.5 years in use I had with the standard 1650 mAh battery problems to get through the day. Most of the battery was about 18 clock all though it was loaded overnight. For this reason I have brought this battery. The mobile phone is thus a bit heavier, but is better in your hand because the "nose" is no longer present on the back of the device. The lid keeps well. With a single charge, I am now definitely over the day, 2 is likely to be scarce.
