My Samsung Omnia SGH-i900 is already some months old, met my needs more fully. To avoid having to charge the battery every day, a new, fresh battery should forth. Now for a few weeks in the daily business, I am afraid to make a bad witness. The battery is not better than the original, which is already in use for years in his performance. I have to recharge at the outlet to the Li-polymer battery in the same cycle. Furthermore, it happens every 5-7 days, the need to start the new mobile phone. Obviously, battery and cell phone is not always tolerated. Cell phone then switches off easily. Another point is the fact that the Polar Cell to add a touch thicker. The cell phone cover does not last longer so flawlessly through the replacement battery. Because of these shortcomings, therefore only 2 stars.