My suspicion is battery life estimating is complicated and proprietary. So your depreciation due to wear depends on both the rate of charge and the rate of disc

My suspicion is battery life estimating is complicated and proprietary. So your depreciation due to wear depends on both the rate of charge and the rate of discharge. My best guess is they shoot for a discharge rate of roughly C3. Meaning they can deliver the rated power for 3 hours. Suspect they keep the charge between 10 and 90%. So I think you can multiply watts by 4 to get watt-hours. That said I've looked for actual numbers in kwh and not found much.