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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[–] warm@kbin.earth 14 points 3 days ago (1 children)

This isn't a fair like-to-like test though. They used iPhones, which use one battery and then for their 120W test they used iQOO 7, which has two batteries that charge in parallel. They aren't testing the charge rate effects on a single battery, but just how different phones behave.

While it's an okay test to see how certain models of phones hold up, it's not a test for longevity of a single battery using fast and and not-as-fast charging.

So the title, as it often is these days on YouTube, is misleading.

[–] BritishJ@lemmy.world 6 points 3 days ago (1 children)

No they did a fast and slow charging group for iPhone, and also did a fast and slow charging group for Androids. Did you not pay attention.

[–] warm@kbin.earth 3 points 3 days ago

The video was pretty poorly structured to be honest, should have been longer with better information and they didn't post their data anywhere to read. I mean they had ~30 seconds just growing plants...

But the point stands, they weren't testing 1 to 1 on batteries (hard to do anyway). There's good reasons for why manufacturers havent just cranked it all to 200W charging.

The video isn't a sudden revelation, we already knew how batteries behave, they've been tested in labs under much more strenuous conditions too.