this post was submitted on 10 Nov 2025
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These are lab conditions, so in reality the degradation is probably quite a bit worse. In practice your battery will reach temperatures ranging from 10-50ยฐC (or much more if you leave it in the sun) for example. High heat especially can cause battery aging to progress at 2-3 times the normal rate. Its also not evident from this graph if these cycles were going from 25-100 and then immediately back down to 25% or if the charge was stuck to 100% for 6h like it is on a real phone that gets charged over night.
Its better than the current situation, but fundamentally phone hardware hasnt really changed in the last 10 years. There isnt really any reason to not use one phone even longer than that. The Fairphone 6 is promising 8 years of software updates for example.
I'm currently writing this on a phone that's 7 or 8 years old. I've had it long enough that it's bent a little from the tension of being in my pocket. The battery has held up pretty well given my absolute abuse of it. I've certainly gotten my $200 worth but I'm not looking forward to having to get a new one.
Fairphone also lets you change out the battery very easily, so it's not that big of a deal if it degrades. You might save the world 20% of a battery's worth of e-waste by micromanaging your charging, which won't really make a difference.
Spot on, batteries are supposed to be consumables that are easily swapped out, but manufacturers are keen on sealing the battery inside so that the whole device becomes a consumable from the perspective of an average consumer.