Add the ability to limit charging at 80%

[Thr0nSK]

A lot of users and I would love to be able to set a charging limit on the Deck to extend battery health. I would like to be able to play off of a power bank and keep the Deck at maximum 80% all the time (the same when charging from an outlet)
I know some linux laptops support this feature so that gives me a little bit of hope that it would be possible to do it on the Deck as well if valve implemented it.
I love how easy it is to replace the joystics, it gives me peace of mind, however, I am a little worried about the battery health - the battery replacement isn't the easiest so I would like to do as much as I can not to need one.

[drbob]

引用自 Fuli：

引用自 Ꝙ Ghosthunter Ꝙ：

50% is seriously low to keep a battery healthy.

What level do you recommend? 70-80%?

Ghosthunter is not correct. Unless you need the full capacity it's best practice to not charge a lithium-ion battery over 80% in day to day use, especially if it's going to sit for long periods plugged in at 100% charge.

This is because lithium ion batteries degrade (lose capacity) at a faster rate when fully charged than when kept below 80% state of charge. See here[batteryuniversity.com] for more information:

Lithium-ion suffers from stress when exposed to heat, so does keeping a cell at a high charge voltage. A battery dwelling above 30°C (86°F) is considered elevated temperature and for most Li-ion a voltage above 4.10V/cell is deemed as high voltage. Exposing the battery to high temperature and dwelling in a full state-of-charge for an extended time can be more stressful than cycling.

Unfortunately the Steam Deck doesn't support this basic feature which is present on almost all modern laptops. Valve deliberately did not support the functionality (charge limit is a standard part of the KDE power manager) I'm at a loss as to why.

[Coffee]

引用自 drbob：

引用自 Fuli：

What level do you recommend? 70-80%?

Ghosthunter is not correct. Unless you need the full capacity it's best practice to not charge a lithium-ion battery over 80% in day to day use, especially if it's going to sit for long periods plugged in at 100% charge.

This is because lithium ion batteries degrade (lose capacity) at a faster rate when fully charged than when kept below 80% state of charge. See here[batteryuniversity.com] for more information:

Lithium-ion suffers from stress when exposed to heat, so does keeping a cell at a high charge voltage. A battery dwelling above 30°C (86°F) is considered elevated temperature and for most Li-ion a voltage above 4.10V/cell is deemed as high voltage. Exposing the battery to high temperature and dwelling in a full state-of-charge for an extended time can be more stressful than cycling.

Unfortunately the Steam Deck doesn't support this basic feature which is present on almost all modern laptops. Valve deliberately did not support the functionality (charge limit is a standard part of the KDE power manager) I'm at a loss as to why.

That's EXACTLY why it's done at the hardware level.

100% in OS isn't the physical battery being 100% charged.

[SpiraTech]

引用自 Ꝙ Ghosthunter Ꝙ：

引用自 Fuli：

There is a feature in Powertools plugin that lets you change the battery charge mode. There is Normal, Idle and Discharge.

Idle seems the way to go. While plugged, for example at 50%, it will mantain the battery at that level.

I don't know ♥♥♥♥ about batteries neither if its safe to use the idle mode or how it works underneath.

Maybe someone can iluminate me cause I actually want to use it while plugged in but I don't want to mess with the battery calibration or health.

50% is seriously low to keep a battery healthy.

Not at all.

50% is almost perfect.

Lower is better, to around 30%, but it'll self discharge over time which is bad if it gets too low.

80% is max recommended.

20-30% is lowest recommended.

A battery will degrade much faster when stored and/or charged to high percents.

Proven facts.

[Coffee]

引用自 Technex：

引用自 Ꝙ Ghosthunter Ꝙ：

50% is seriously low to keep a battery healthy.

Not at all.

50% is almost perfect.

Lower is better, to around 30%, but it'll self discharge over time which is bad if it gets too low.

80% is max recommended.

20-30% is lowest recommended.

A battery will degrade much faster when stored and/or charged to high percents.

Proven facts.

Then have fun with your battery dying!

[SpiraTech]

引用自 Ꝙ Ghosthunter Ꝙ：

引用自 Technex：

Not at all.

50% is almost perfect.

Lower is better, to around 30%, but it'll self discharge over time which is bad if it gets too low.

80% is max recommended.

20-30% is lowest recommended.

A battery will degrade much faster when stored and/or charged to high percents.

Proven facts.

Then have fun with your battery dying!

Lol I've seen enough of your posts on here to know about your knowledge level on batteries.

[abriellafiel]

引用自 drbob：

Unfortunately the Steam Deck doesn't support this basic feature which is present on almost all modern laptops. Valve deliberately did not support the functionality (charge limit is a standard part of the KDE power manager) I'm at a loss as to why.

Note that KDE only supports this for some HW. My laptop has this functionality exposed in the BIOS configuration (charge limits) but it is not exposed in KDE control center. The ability to do this could still exist in the battery charge controller but we do not know how to set it, I would like valve to comment on this. But they never reply to the different threads about this and not to threads about other feature requests either. Maybe we should contact support directly...

[drbob]

引用自 Ꝙ Ghosthunter Ꝙ：

引用自 drbob：

My deck is about 8 months old and it’s already down to 60% battery health (i.e lost 40% off the original capacity) - compare that to my 2019 laptop which has a battery saver feature (stops charging at 80% full) and is only just now, after 4 years of heavy use, hitting a similar level of battery degradation.

Battery health thing is bugged actually. There's tricks to get it back to 100%. Physically, your battery isn't unhealthy at all.

I did a recalibration by fully discharging the battery in desktop mode (disabled sleep and the emergency shut down at 5% capacity.) The deck battery gauge froze at 2% / 9 minutes remaining for 3 hours!

After a full charge this has helped and battery health is back to over 90%. Need to do more testing as I don’t know if the battery will hold up under high load, but the gauge does seem to be very prone to drift.

[Fuli]

New update from Powetools has the feature to limit battery charge by %.

[~Senpai]

引用自 Fuli：

New update from Powetools has the feature to limit battery charge by %.

YO?

Edit: YOOOOOOOOO

[SpiraTech]

引用自 Fuli：

New update from Powetools has the feature to limit battery charge by %.

Thanks for the update, great to hear. Shame Valve couldn't do it before a third party dev...

I'll give it a try (I don't use my Steamdeck too much) but does anyone know if it works with the Steamdeck off also?

https://github.com/NGnius/PowerTools/releases

[Fuli]

Seems like the feature is bugged.

With the option checked and setting max charge to 80% everything works until you close a game. Then, the max charge value will reset to 90%.

Still works tho.

[SpiraTech]

引用自 Fuli：

Seems like the feature is bugged.

With the option checked and setting max charge to 80% everything works until you close a game. Then, the max charge value will reset to 90%.

Still works tho.

You can always report issues here, it helps the devs:
https://github.com/NGnius/PowerTools/issues

[Codec]

引用自 Technex：

引用自 Fuli：

New update from Powetools has the feature to limit battery charge by %.

Thanks for the update, great to hear. Shame Valve couldn't do it before a third party dev...

I'll give it a try (I don't use my Steamdeck too much) but does anyone know if it works with the Steamdeck off also?

https://github.com/NGnius/PowerTools/releases

Nice, there is something similar for Laptops where 3rd party tools allow for extra controls over stock - For example 'aldente' for Apple laptops

Being able to set your own percentage is good also, I'd quite like to set mine to 70% while in the dock.

Thanks for posting this

[SpiraTech]

It works well when on, but when the deck if off or standby it doesn't work at all sadly.

[FREZARIO]

+1, Please!!!