Dell Latitude 5480 Battery Replacement

Hello,

I have a Dell Latitude 5480 that currently has a 42 Wh 11.4v Battery Type: WDX0R.

Is it possible to install a 64 Wh battery instead? From what I have read the 68 Wh is a 7.6 cell model but the current 42 Wh is only 11.4v.

It says the 5480 is compatible on the website. 

https://www.dell.com/en-au/work/shop/dell-68-whr-4-cell-primary-lithium-ion-battery-for-latitude-5280-5290-5480-5488-5490-5491-5495-5580-5590-5591-precision-3520-20/apd/451-bbzg/pc-accessories#tabs_section

PS. I do not have the 2.5" drive installed so there is extra room available. 

Regards,

Peter