Hi everyone,
I have a Slimbook EVO14-AI9-STP, bought in November 2025, running SlimbookOS 24 with KDE Wayland.
After a normal charge/discharge calibration cycle, the system is now reporting battery health at about 76.9%, which seems unrealistic to me considering the laptop is only about six months old and has been used normally.
Current system information:
- Model: EVO14-AI9-STP
- OS: SlimbookOS 24
- Kernel: 6.17.0-1020-oem
- BIOS: N.1.20GOS04
- EC Version: 1.29
- CPU: AMD Ryzen AI 9 365 w/ Radeon 880M
- Power profile: balanced
Current battery data:
upower reports:
- energy-full: 61.6 Wh
- energy-full-design: 80.08 Wh
- capacity: 76.9231%
- charge-cycles: N/A
sysfs reports:
- POWER_SUPPLY_CHARGE_FULL_DESIGN=5200000
- POWER_SUPPLY_CHARGE_FULL=4000000
- POWER_SUPPLY_CHARGE_NOW=3960000
- POWER_SUPPLY_CAPACITY=99
- POWER_SUPPLY_CYCLE_COUNT=0
Before the calibration cycle, the reported battery health was around 82.7%. After the cycle, it dropped to about 76.9%.
The battery still seems to behave reasonably in real use: after around two days without charging, I was at about 42%, so the practical autonomy does not seem consistent with such a severe degradation.
I also noticed that cycle_count is reported as 0, which makes me think that the battery data may not be read correctly by the firmware/kernel/ACPI layer.
In journalctl I repeatedly see:
- ACPI: battery: Slot [BAT0] (battery present)
- qc71_laptop_module_init: failed to initialize battery submodule: -19
- org.kde.powerdevil.chargethresholdhelper.getthreshold failed "Charge thresholds are not supported by the kernel for this hardware"
So my question is: has anyone else with the same or similar Slimbook model seen unrealistic battery health values, wrong cycle count, or battery data changing significantly after calibration?
I am trying to understand whether this is likely a real hardware battery degradation issue or just an inaccurate reading/calibration/firmware issue.
Thanks.
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EVO 14 AMD Ryzen AI 9 — Battery health suddenly reported as 76.9% after about 6 months — possible reading/calibration issue?
EVO14-AI9-STP
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Mejor respuesta
Good morning,
I recommend you to open a ticket to our support team, as they might be able to help
You can open one at https://slimbook.com/en/support
Regards,