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I have experienced 4 to 5 hours, less if you are playing high end games.
Sorry, there was a problem. Please try again later.I tried to use the battery and it lasts about 1 hour and a half due to its performance... I think that you could buy a battery apart. However, don`t buy it, because could happen as happened to me that the notebook receives a hit and it doesn't turn on anymore. Now that I'm in South America, DELL doesn't give solutions and I need to find a way to try to repair it. Check this posts to confirm what I'm telling you: https://www.dell.com/community/Alienware-Laptops/Alienware-17-r4-Wont-boot-up-or-turn-on-or-charge/m-p/6085883/highlight/false#M14003 Don't buy it.
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