Prolong Laptop's Battery Life

I have downloaded, for my Lenovo laptop, a power management utility by Lenovo with an option to 'extend battery life.' Essentially, the software works by maxing out the battery's charge at 60%. Moreover, it limits recharging the battery until the charge drops to 55% or so (meaning one could conceivably use the laptop plugged in for weeks without it constantly being charged - until the charge on the battery naturally drops to 55%, that is). Any ideas as to whether this might prove to be effective with respect to promoting battery life, recharge cycles? What are some measures I can take to prolong the life of my laptop and it's battery throughout my time in university? Is it the battery I should be truly be worried about or will something else be an issue first? If the battery does lose it's capacity to hold a charge, may I transition to using it fully as a 'desktop?'

P.S. The laptop's battery is non-removable so using the laptop as a desktop PC only is unfeasible.

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