If any one is looking for sources about battery degradation, there is a decent paper from a few years ago that gives a nice run-down with lots of references. https://www.sciencedirect.com/science/article/pii/S2352152X19314227
A few highlights:
"Zhang et al. show that a typical laptop battery stored at 25 °C and 100% SoC will irreversibly lose 20% of its capacity each year."
"Hoke et al. argue that if battery temperature and charge-discharge cycling are kept constant, minimizing time spent at high SoC minimizes degradation. If the next day's energy requirement is known, the battery can be charged to the minimum required level, rather than to the conventional full charge."
"Lunz et al. show that battery lifetime can be increased by reducing the target SoC to lower values, or by minimizing rest periods at high SoC."
"Because standby times dominate battery operation, there is a large opportunity to increase battery lifetime by adjusting the time and frequency of charging (smart charging)."