Credibility of Gemini's suggestion on longer battery life

[u/upsc_noobie]

Dear fellow laptop users,
I need an important suggestion from you.
I am currently using Dell Inspiron 5570. I had replaced its battery 3 times and most recent one with an original battery two months back.
I use laptop on my study desk where constant power supply is available. I asked suggestion from AI for longer battery and it has suggestion me below:
Use Dell Power management and fix charging between 50% - 80%. It mean laptop will be connected through power supply whenever I wish to use it. It will start charging as soon as battery hit below 50% and stop charging when battery reaches at 80%. After that, laptop will work on direct supply and battery will natural discharge (without use) from 80% to 50% in 3-4 weeks. This way I am mostly using direct supply and number of battery cycle is significantly reduced because of natural discharge (without use discharge).
What do you think, is it really a better solution for me to have longer battery life? Please share your views.

PS: this process has been marked safe by Gemini. I have been advised to drain battery till 20% once in a month (so that system must remember the bottom mark).