Dell laptops have easy battery charge config
While many people enjoy long battery life, surprisingly few are aware that adapting the charge cycle can help extend battery life significantly. Apple integrates this into their products, but I'm not aware of any PC laptops that do.
Fortunately, Dell has utilities to allow doing this rapidly from the command line,
https://www.dell.com/support/home/en-us/drivers/DriversDetails?driverId=42VJ8
Once installed, on Ubuntu, the utility allows getting & setting the charge config easily, e.g. here I read and then updated the config, from charging at/under 60% & stopping at 80% (a long-battery life option) to charging at/under 80% & stopping at 90% (a "I won't have a wall socket anytime soon" option),
duke@d3ll15:~/Downloads$ sudo /opt/dell/dcc/cctk --PrimaryBattChargeCfg
PrimaryBattChargeCfg=Custom:60-80
duke@d3ll15:~/Downloads$ sudo /opt/dell/dcc/cctk --PrimaryBattChargeCfg=Custom:80-95
PrimaryBattChargeCfg=Custom:80-95
duke@d3ll15:~/Downloads$ sudo /opt/dell/dcc/cctk --Virtualization
Virtualization=Enabled
Other BIOS options like virtualization are also accessible.