One useful piece of software is the ThinkVantage Toolbox, which comes preinstalled.
This software performs a number of functions, including diagnostics and performance tuning.
it is very easy to use!
There are also a number of tools and controls available outside of the Toolbox app.
Another really useful application is the Power Manager. From here you can see the status of your battery, power use and more importantly, make changes to your power profile.
You are even told if your power configuration meets industry recognised green standards, if you are interested in that sort of thing.
You can easily change your power settings, so it’s worth exploring the various options until you find a profile, or profiles, that match your needs.