> The 85% charging limit has prevented the battery from degrading much over the years
Sorry, what is that? Is this something everyone knows, or some secret lore. I keep meaning to look up the basics of batteries and prolonging their life, and still haven't got their, so this comment triggers me (in a good way).
I think it's called "protect battery" or something like that in recent versions of Android, it just caps the max voltage your phone will charge to if left connected.
The basic deal is this: lithium cells like being at sort of half charge (typically 3.85V) where they don't degrade and this is called storage charge as a result. It's what any battery that's in a box or on a shelf will be at.
Going above 90% and under 15% (voltages depend on the exact chemistry) will do damage especially if left that way more than a few hours. So if you say, leave your phone on your bedstand to charge overnight, it'll do fast charging (which also does damage btw) and get itself to absolute max in like half an hour and then sit there for another 7-8 hours degrading until you unplug it. That's what this mainly prevents in practical day to day use.
So yeah, for best battery longevity charge with up to 1C (e.g. for a 3Ah battery, that's 3A max), charge in large chunks and try to keep it between 25-85% for the most part. Then you're basically guaranteed to get the max number of cycles out of it.
There's also another great feature called "power saving" which reduces power draw significantly (at least on my phone)by reducing background spying and capping CPU speed so it can last for 3-4 days if I don't use it much, which again saves a lot of charge cycles.
Sorry, what is that? Is this something everyone knows, or some secret lore. I keep meaning to look up the basics of batteries and prolonging their life, and still haven't got their, so this comment triggers me (in a good way).