this post was submitted on 09 Nov 2025
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Is Fast Charging Killing the Battery? A 2-Year Test on 40 Phones (www.youtube.com)
submitted 3 days ago* (last edited 3 days ago) by popcar2@programming.dev to c/technology@lemmy.world
179 comments fedilink hide all child comments
 

TL;DW: Fast charging over 2 years only degraded the battery an extra 0.5%, even on extremely fast charging Android phones using 120W.

And with that, hopefully we can put this argument to rest.

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[–] shane@feddit.nl 14 points 2 days ago (2 children)

I always find the same study referenced, which was good science but also almost 30 years old. I wonder if this is still true for modern batteries?

[–] floquant@lemmy.dbzer0.com 6 points 2 days ago (1 children)

Correct me if I'm wrong, but as far as I know there haven't been significant changes in Li-Ion and LiPo batteries aside from extra density - which would only increase the effect. But it seems like solid-state batteries are starting to hit the real world now

[–] AA5B@lemmy.world 2 points 2 days ago

I bet thats wrong, but I know ….

There've been usage changes

  • iPhone has “Optimized Charging” where it predicts usage and tries to keep about 80% charge until it expects you to use it
  • iPhone has “Adaptive Performance “. Maybe not charging but tries to gradually ramp to “low power mode” to be gentler on the battery
  • all phones likely have refined charging curves to match battery technology
[–] village604@adultswim.fan 2 points 2 days ago

It is, but phone manufacturers know this and already programmed their charging circuits to take it into account.

But if you're using 18650 cells or some other lithium based battery for other purposes (vapes for example), it's something to keep in mind.