alt Hacker News> the best solution is slow charging, for which a low-power charger from your old feature phone is ideal. These devices offer a small power output of 2–5 W, stretching the charging process to 5–7 hours depending on the adapter's power and the battery capacity. This way, your phone's battery charges under the best conditions, minimizing degradation
I've been charging my iPhone this way since the iPhone 4 (trickle charging overnight) and have noticed zero improvement in battery degradation performance vs. fast charging.
As a current example, my iPhone 15 Pro, purchased a month after launch, is at 85% capacity.
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My iPhone 15 Pro Max, first use on September 2023 is at 98% capacity. Charged mostly on a wireless charger and the charge limit set to 80%.
Anecdotally speaking, the 80% limit seems to be key to better battery aging long term.Anecdotally speaking, the 80% limit seems to be key to better battery aging long-term.
My launch-day iPhone 15 Pro Max is at 95% battery health. That phone has had the 80% limit enabled since day one, and I very rarely have had to increase it for specific busy days.
My previous iPhone 12 Pro Max very quickly descended to 88% battery health after a year.
My charging habits remain the same: fast and furious Magsafe/Qi/Qi2 charging every time there is a charger nearby (remote worker, so that’s almost all the time).
I do have unpleasant thoughts about the 80% battery charge limit not being available on anything older than the 15, since it turns out it can be sideloaded via Nugget and MobileGestalt manipulation.
Not enough to push me away from the walled garden (these phones are aging better than my previous flagships from other ecosystems), but a reminder of the rough edges in it.