Good cheap battery

Having my Dell Studio 15 for 5 years, I wanted to give him his youth by putting Windows 8 and a new cheap battery to the views of the computer age.
After 3 weeks of use, here are my impressions cold.
Autonomy is low (one hour of intensive use and 1h30 for video playback), but matched my expectations given the price.
I tried to find cheaper but hey, I have not found a site also known as Amazon so I am not asked myself the question too long.
In short, it will help you out when traveling for incidental away from a power outlet.
Product therefore not miraculous but honestly fulfilled its role.
Otherwise, excellent packaging that protects the product well.