I bought this battery in September, and it's been 7 months so it is running on a PC that continuously heats particularly strong. She remains in great shape. So I recommend the product. Li Ion battery problem is like for fresh products: they must have an initial charge of around 50% and be maintained around 5 to 10 ° C for not too old during storage. And anyway they get damaged over the years of storage, This explains it is common to find on the web a poorly stored battery that gives you satisfaction for 10 days, just enough time to leave positive feedback before died suddenly.