Laptop battery quickly losing capacity

I have a brand new Lenovo Yoga Slim 7 (about two months old). The battery health report in the Lenovo Vantage app shows the current battery capacity as 58.24 Wh, compared to a design capacity of 60.7 Wh. I checked it the day I bought the machine, and the current capacity was 60.7 Wh too at the time. The current cycle count is 15. Laptop has been plugged in almost 24x7 with conservation mode enabled, so battery is always at 60%. These batteries are supposed to lose ~5% capacity over a year, not 4% in a quarter of that time. I'm hoping to find whatever is causing this and fix it before it gets s

Question by Dakshin on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.