Bios Battery charging limit ignored

Framework Laptop 13
1

Hey,

my battery always charges up to 100% and my bios setting with 80% charging limit is ignored. Someone else have this issues?

Regards

2

Can’t help, but you should provide the BIOS version you’re running :slight_smile:

3

Update to the latest version: Framework Laptop 13 Ryzen 7040 BIOS 3.09 Release

4

Disable the battery extender in the bios.
Power off laptop (not suspend).
Wait 2 mins. And power on.
This resets the EC.
If you wish to use the battery limit of 80%, you don’t need the battery extender function as that is for protecting a 100% charged battery.

5

Its the new Ryzen 9 HX 370

6

Sorry there is only the release bios for the Ryzen AI yet

7

Sorry maybe thats got lost, I don’t talk about battery extender, I talk about charging limit

Currently that’s my configuration

PXL_20250523_091156036
PXL_20250523_0911560361920Ă—2550 291 KB

I had it setup exactly like that for my old 7040 Mainboard and thwt configuration never charged more then 80%

8

And battery extender can mess with the charge limit (or at least id did on the 7x40u).

2 Likes
9

Ok, that is good that you have “Battery Extender” disabled.
The EC code has some bugs in it, that under some situations, it escapes its 80% limit.
When that happens, you can discharge it back to below 80% and it probably will not hit the edge case again for a while.
In any case, going through the EC reset I described should help.
I have written my own bug fixes to the EC code, but it only works on FW13 AMD 7840U, 7640U and FW16 AMD 7840HS. So, they won’t work on your AI 370.

10

It’s a known issue as described here : F13 AMD AI 300 - Battery charge limit ignored on subsequent boots · Issue #67 · FrameworkComputer/SoftwareFirmwareIssueTracker · GitHub

framework released a laptop with a buggy bios. We have to wait for them to merge the fix from 7040.
The only bios available for AI 300 now is the 0.3.3 which is can not be suitable for production systems.

11

Okay I did the following, restart into bios, set charging limit to 100, powered down for 10 minutes, now I booted the machine, set charging limit to 80, now I booted up the os and will wait for the battery to drain under 80

12

My pre-built 370 exhibits consistent behavior: Battery limit set to 80%. When shutdown and charger cable is plugged in, it will exceed 80%. When running W11 and the charger cable is plugged in, it will maintain 80% charge, running or sleeping (lid shut).I haven’t tried hibernate.

13

Looks like a bug in the firmware with my 7840u Board I never had this issues…

14

Thanks for catching the LVFS record, a touch concerned by it…

15

I’m facing the exact same issue on my HX 370.
Setting charge limit using @DHowett’s ectool at system boot is my current workaround:

sudo ectool chargecontrol normal 80 80