https://batteryuniversity.com/img/content/DST-cycles-web2.jpg https://batteryuniversity.com/img/content/DST-cycles-web2.jp... To save a click, maximum battery

https://batteryuniversity.com/img/content/DST-cycles-web2.jpg https://batteryuniversity.com/img/content/DST-cycles-web2.jp... To save a click, maximum battery longevity is achieved keeping it between 75 and 65 percent SoC. (But only a psychopath would do that, the third best lifespan is 75-25%) The deeper you discharge it and the higher you charge it, the shorter the lifetime.