The battery was delivered quickly and fits my laptop (Samsung E 452). It can be easily load to 100% and then holds as good as the original battery, as well as after a month use (loaded approximately once a day). However, occasionally seems communication between battery and laptop disturbed - then the low battery level is not displayed correctly and the power goes out at the end and so that the laptop, without that I get a warning message. Therefore 1 star deduction.