If my memory serves me correctly, the battery health (recharge cycles) will be prolonged if you charge to only 80% and remember to not leave a dead battery sit. Anything above 80% causes corrosion to the anode and anything below the discharge rate is unstable for the cathode (something like that).
From batteryuniversity.com:
"Most Li-ions charge to 4.20V/cell, and every reduction in peak charge voltage of 0.10V/cell is said to double the cycle life. For example, a lithium-ion cell charged to 4.20V/cell typically delivers 300–500 cycles. If charged to only 4.10V/cell, the life can be prolonged to 600–1,000 cycles; 4.0V/cell should deliver 1,200–2,000 and 3.90V/cell should provide 2,400–4,000 cycles."
"In terms of longevity, the optimal charge voltage is 3.92V/cell. Battery experts believe that this threshold eliminates all voltage-related stresses; going lower may not gain further benefits but induce other symptoms."
"Most chargers for mobile phones, laptops, tablets and digital cameras charge Li-ion to 4.20V/cell. This allows maximum capacity, because the consumer wants nothing less than optimal runtime. Industry, on the other hand, is more concerned about longevity and may choose lower voltage thresholds. Satellites and electric vehicles are such examples."
https://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
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4.1V provides 85-90% of full charge and 4.0V provides 70-75%. Something to consider if you're not planning super long trips and have chargers available.
Marketers know consumers are greedy and want the "most", so they have to find an optimal charge cap that will satisfy what consumers want while also still remaining marketable. 300-500 cycles is considered the "norm" at this point (charging to full 4.2V), but definitely not as efficient. This is also why battery health apps on your laptop only allow you to charge your battery to 60% - it's near that 3.92V optimal discharge cap.
I apologize that this got super long-winded.