I recently installed Arch and noticed that acpi was reporting the incorrect battery capacity value, here is the output:

acpi -i
Battery 0: Charging, 87%, 00:14:12 until charged
Battery 0: design capacity 3197 mAh, last full capacity 3197 mAh = 100%

acpi reports that my design capacity is 3197 mAh, when my battery's actual capacity is 6189 mAh (according to the specs provided by the datasheet of the battery, and the actual label of the battery, a genuine HP product).

I attempted to change the value of my design capacity at /sys/class/power_supply/BAT0/capacity_full_design but I get permission denied error, even as root.

How can I manually tell Arch my actual battery capacity?


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