Modern batteries deteriorate from heat and from the time they spend at the extremes of their charge cycle. As a general rule of thumb, you would get the lowest

Modern batteries deteriorate from heat and from the time they spend at the extremes of their charge cycle. As a general rule of thumb, you would get the lowest amount of wear by keeping the battery as close to 50% as possible all the time, only charging higher than that right before use and just enough to make it comfortably to the next charging opportunity. One of the worst things to do to a battery (not as bad as a deep discharge) is keeping it on full charge standby all the time. Think desktop replacement laptops. For a while I only charged my phone in the morning when it was still at >50% in the evening, e.g. a 40%-70% charge. In the end, convenience prevailed.