Is charging my phone to 85% saving battery life expectancy?

Question

Since Android 12, I can charge my phone (s10e) up to 85% instead of 100%. Is there any studies on how much this is improving battery life expectancy?I can also do this on my laptop: up to 60% or 85%. Same question.Any studies on how much those should impact battery life?

sphars · Accepted Answer

Someone else can correct me, but from what I've heard, limiting the charge threshold on devices is only helpful if the device is plugged in a majority of the time. A laptop that is primarily docked will benefit from limiting the threshold. Thinkpads (and others) have had this feature for a long time.With phones, whether it makes a difference, I'm not sure. Smartphones and batteries have become smarter to help with overcharging and extending life of the battery by slowing the charge rate when it gets to over 80% or so. I personally don't use thresholds my phone, it charges fast enough to make up for it.

youniverse · Answer

Someone correct this if wrong but I watched a video that claimed 50% is the optimal level that keeps degradation at lowest levels. That may be why you have the decreasing options on the laptop going even down to 60% which I've never heard of.
It had something to do with the charge of lithium ions wanting equilibrium. The further it is from 50% in either direction causes wear due to ions moving around. Letting the battery completely die also wasn't recommended. We really need some experts to set this all straight!
These days worrying about extending your battery life by 5-10% is not worth the hassle of worrying about it. Apple products seem to have smart enough charging and others are probably similar. Imo not worth wasting brain cycles on.

speedgoose · Answer

The how much is a difficult question because it depends a lot on the battery design, chemistry, and its integration.
The battery degradation chemical reactions is mostly based on the voltage (state of charge) and the temperature. The higher the voltage and temperature, the more the “bad” chemical reactions will happen.
An always connected laptop is the worst because their BMS (battery management system) are usually shit, the battery is always at a high state of charge, and very warm from the cpu and gpu.
It’s a bit better on a phone.
It’s much better on an electric vehicle with a proper BMS and active cooling/heating.

jerrygoyal · Answer

Keeping your device always plugged in does reduce the overall battery life. When I was on Windows, I used an AHK script that would notify me whenever the laptop is fully charged to unplug the charger.https://gourav.io/blog/autohotkey-scripts-windows#show-notif...

kosasbest · Answer

I read somewhere that charging a phone fully, and then letting the battery die down to zero, then recharging helps keep the battery alive longer than constantly keeping it at 100%. Keeping it permanently charged kills the battery quicker apparently.

pestatije · Answer

If hi speed charging lowers battery life, I follow that low speed charging will lengthen it.

Is charging my phone to 85% saving battery life expectancy?

Since Android 12, I can charge my phone (s10e) up to 85% instead of 100%. Is there any studies on how much this is improving battery life expectancy?
I can also do this on my laptop: up to 60% or 85%. Same question.
Any studies on how much those should impact battery life?

Keeping your device always plugged in does reduce the overall battery life. When I was on Windows, I used an AHK script that would notify me whenever the laptop is fully charged to unplug the charger.
https://gourav.io/blog/autohotkey-scripts-windows#show-notif...

I read somewhere that charging a phone fully, and then letting the battery die down to zero, then recharging helps keep the battery alive longer than constantly keeping it at 100%. Keeping it permanently charged kills the battery quicker apparently.

If hi speed charging lowers battery life, I follow that low speed charging will lengthen it.