So, as promised I share the reply of the support with you.
They will take this topic to their considerations for our future developments. We will see if there come improvements in the future…
As a direct measure their extend there FAQ Wiki topic FP4. Maximize battery lifespan the following point attached.
So at least we have a official recommendation how to load the battery of the FP4 sustainable. Probably the same apply to the older Fairphones.
1.5 - Charge regularly
Situations vary, but we recommend to keep the charge of your battery between 80% and 20% at all times to keep it longer. So there is no need to always have it topped off to 100%, but do not wait until 1% is left, either!
Quick charge and fast charge are possible and convenient, but does not extend the lifetime of your battery. Slow charge does. So like taking care of babies: regularity and moderation will last you a longer time!
@amoun Thanks for the detailed explanation! With that your conclusion seems valid to me.
So generally QC has no significant shortening impact to the battery, but when you load your phone over night it would be better to charge slow so that the phone stays longer in the healthy area between 20% and 80% and not so long at the maximum, which is not good for the battery.
For the short daily charging to 80% (wich should be preferred) QC make sense, because it is way more practical to monitor with the shorter charging time.
If I understand this part correctly you contradict yourself. First you say QC can cut or limit the feed and then that theri is now way to cut whichever QC or not is used.
Does QC cut or limit the feed. Then it probably wouldn’t also so bad to charge with QC the hole night.