WetGeek Tom, I suspect your laptop batteries will last a LOT longer than a year. Have you ever worn one out?
Of course I have. I've been using laptops for work and personal use since the late 1980's. I've replaced at least a dozen batteries in that time frame.
Battery technology has improved a lot over the years, but batteries wear out with use and attendant drain/charge cycles. Simple chemistry.
WetGeek Like all my laptops, since I've had it, it's been used on A/C 24/7.
My guess is that the reason you get better battery life than I do is that your laptops are used as desktops -- you don't use the battery at all except rarely. If a battery is not used, it doesn't wear out as quickly.
It doesn't work that way for me. I use laptops as laptops.
Until today, the Latitude 7390 was plugged in only for charging and for BIOS upgrades, as are all my laptops. Otherwise it ran on battery, day after day. It doesn't surprise me that the battery is at 85% of design capacity after a couple years of use.
My Latitude 7520, bought in February, has a design capacity of 62 mWh and a current full charge capacity of 60 mWh. It gets used about an hour a day and charged twice a week, so I expect the battery to lose capacity slowly until I start using it more. My old Latitude 7280 battery had just under 60% of design capacity when I gave it to my grandson, so I replaced the battery before I gave it to him. My Inspiron 3180, bought in 2017, has about 54% of design capacity of this point. Not a problem, because I use it once a day, for about 35 minutes, to play a game, and that is all I use it for.
I keep my computers for about 6 iCore generations before I replace them. Roughly six years. In NASCAR the saying is "if you ain't rubbing, you ain't racing", and the laptop equivalent is "If you ain't wearing out a battery every few years, you ain't using it." You use a laptop, but it is a desktop with a laptop form factor, given the use pattern you describe.
That's just the way it is. Use it and lose it.
