Unfortunately, after 5 months of use, the battery is not functioning! I returned from vacation and the battery was on the laptop for 2-3 weeks, I hadn't removed it, the laptop was obviously closed, and since then there is no power in the battery, as if it doesn't exist. Initially, I was very satisfied.. with battery saving and simple use (internet, office file usage) it exceeds 4-5 hours of autonomy. With more demanding use, it ranges around 2-2.5 hours in the first few months at least.. The packaging is very compact and carefully placed inside. Since HP laptops start having issues with their batteries around 2 years, it is a reliable and relatively economical solution (around 40 euros) to extend the comfortable use of your laptop and its portability for at least another 2 years as it seems.