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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[โ€“] stealth_cookies@lemmy.ca 10 points 3 days ago (1 children)

What you call 0% or 100% on a battery is an arbitrary number anyway. Absolutely never do this for safety reasons, but back when I worked for a battery lab I did experiments where I discharged cells to below 0V.

[โ€“] Zink@programming.dev 1 points 2 days ago

In a previous job I once evaluated some returned product that wasn't having the best battery life or wasn't working right. It was specialized expensive equipment that used regular alkaline batteries.

TL;DR: ordinary batteries can have negative voltage if you don't give a fuck and just mix your old and new ones in a drawer before you put them into your high-cost life-saving equipment.