Since I changed the battery in my Samsung Wave 2 has 2 and a half years, I have more concern, it holds the charge on average 4-5 days in low use (a few sms or phone call by a small day) which is very good because it has never been this much even when the laptop was new. Recently, the old battery hardly held more than a day still low use. By cons, when you change the battery, it is imperative to support the minimum cell 12 hours. Product arrived promptly as agreed. I am very satisfied with this purchase considering the price and use that I made; more it extends the life of my laptop. Thank you