Is Fast Charging Killing the Battery? A 2-Year Test on 40 Phones [video]

https://www.youtube.com/watch?v=kLS5Cg_yNdM

by teekert • 6 months ago

34 7 6 months ago

Very cool experiment.

Anecdotally, very happy with a 2018 Oneplus 10, the 80W charger charges it to full in 20min. Will never get a slow charging phone ever again.

gpapilion• 6 months ago

So the answer is yes, but not to a noticeable amount. Don't worry about protecting your battery life, and charge your phone as needed.

lxgr• 6 months ago

My anecdata fully supports that conclusion.

I tried very hard to keep my battery healthy by only charging my phone to 80%, which resulted in me running out of battery quite often throughout the day, interrupted charging cycles etc., which apparently all were worse than just charging to full (via "optimized charging" which finishes the charge in the later hours) overnight.

I lost about 10% of reported battery health that way in less than a year, switched to just charging overnight or whenever getting close to empty, and have lost all of 3% over the second year of using this phone.

On top of that, swapping an iPhone battery is annoying, but having to worry about all of those battery health concerns is much more tedious.

grandma_tea• 6 months ago

My understanding is that battery degradation is not linear with time.

vrighter• 6 months ago

So you're still 7% ahead of charging only to 80%.

thatguy0900• 6 months ago

My phone has a mode that will charge it slowly overnight during set hours but unrestricted charging during daytime, feels like the optimal solution

hulitu• 6 months ago

What Phones (model) were used, how old, what battery chemistry ? Which ambient temperature ? How was the battery discharged ?

Is Fast Charging Killing the Battery? A 2-Year Test on 40 Phones [video]

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