This is the official dell community support, and none of the moderators tried to answers my question. I hope that when we bought your products you're happy, but when we have problems with it, there is nobody there to help you.

bump!

Hi Raul HUTU,

I regret for the late response. Please share the system model and the operating system. For more information regarding longevity mode, you may refer to the link: http://bit.ly/ZOFCCX.

Keep me posted with the information. I will be glad to assist further.

Hi,

I have an Dell Inspiron 7520, with windows 7 on 64 bits... I read the manual, but it's not working for me... I activate the longevity mode, I charge the laptop to 100%... surfing the net untill 50%, then let's say i want to use an video editing program that use a lot of resources, and i plug the ac adapter. In this case with longevity activate, the battery should not charge to protect the battery, but it`s charging..

Hi Raul HUTU,

You may update the system BIOS. Please refer to the link: http://dell.to/11DhnEe.

Note: Before updating BIOS please ensure that:
*Battery is 10%> or >10% charged
*Battery charger should be connected
*No external devices (flash drives, printers, external hard drives) should be connected.
*All other programs should be closed and documents saved

Keep me posted with the results. I will be glad to assist further.

I updated my bios, I installed windows 8 on x64 and all the drivers for my service tag. I activated the longevity mode, and disabled the desktop mode
The problem is still there... any solution?

Hi Raul HUTU, for me I'm having problem with longevity mode it's grey out I can't enable it, for desktop mode I can turn it on. what it's the problem? My Laptop is Inspiron 15r 7520.