Battery Charge Limit

[Cesese]

Please allow us to set charge limits on the Steam Deck. It'd be nice if we could do it directly from SteamOS, but even just getting it on the BIOS would be a good start. The best would be, ontop of getting an option in the KDE Advanced Power Settings, to also make it into Steam's power settings menu (with FPS limiting etc.)
I plan on using my SteamDeck a lot plugged in, so I don't want to charge it to 100% when doing that.

• Here's what I want: https://i.imgur.com/rOuMRjn.png
  
• Here's what we have: https://i.imgur.com/iNgMNKw.jpeg (BIOS) / https://i.postimg.cc/LsFh2FF1/D4-E68918-1361-46-DF-A149-6-A7-EEFB50465.jpg (SteamOS)

[NGniusness]

I guess I don't need to worry about bumping this too much due to that last message...

The latest version of PowerTools has a fix for the battery charge limit

[dgw]

To the top again!

If Power Tools can do it from Decky, the first-party power settings can do it too.

[emberfiend]

Yeah, for those of us who prefer not to install mods, this would be really valuable. Everything comes with charge limit options these days, from electric vehicles to flagship phones to laptops.

[emberfiend]

more necromancy

[shinsei_kaburagi]

same, I have an device called Qudelix 5K, and this device has the option to change the max charge capacity to 80% or even turn off the charging altogether for some time

[Spook]

Valve?

Why?

For more than 2 years people have been asking for this feature, which surely can't be hard to implement.

And up until a recent update i was able to set a limit myself by means of Konsole, but now this limit has been reset to 0/unlimited, twice already, for god knows whatever reason!

Valve, WHY!?

[RadiKarl]

Still the feature I miss the most

[emberfiend]

volvo please.

[K9 Acupuncture]

I want this feature too please

[K9 Acupuncture]

bump in the night

[emberfiend]

Please give us a charge limit. Doesn't even have to be configurable, just whack the 80% cap toggle on there like Samsung does.

[Konstantinos]

I hope too that Valve will add this feature on the next big update of Steam OS!!!

[Cossty]

in few months I will be using steam deck as my primary pc, I really need this.

[dctoday]

+1

[孔明の罠00110]

need help Permission denied on steam OS 3.6.20
kernal version 6.5.0

Publicado originalmente por Rodomar705:

Publicado originalmente por ~Senpai:

Just coming back here to update this:

With the non-dev preview branch now updated to 3.5, you may run into a permissions issue when trying to change this setting in Konsole:

sudo echo 80 > /sys/class/hwmon/hwmon4/max_battery_charge_level
bash: /sys/class/hwmon/hwmon4/max_battery_charge_level: Permission denied

Apparently the ">" operator attempts to run before sudo, meaning that you technically aren't running this command as root and it fails.

To fix this, use this command instead:

echo 80 | sudo tee /sys/class/hwmon/hwmon4/max_battery_charge_level

You can verify this is set with the following command:

cat /sys/class/hwmon/hwmon4/max_battery_charge_level

Happy charge limiting!

EDIT: One more update here because this is REALLY interesting - It looks like PowerTools recognises if you're on SteamOS 3.5 and alters this setting directly! So previously where PowerTools charge limit would not work with the Deck turned off, now it DOES!

I'll keep an eye on things incase I'm wrong but that's a HUGE W for PowerTools if this is true.

You need BIOS 116 for this, they have added the handlers to do this from a software level, just for your info.