In the Advanced Power Settings, one may now limit the battery charge limit in
order to extend its lifetime. The default value is charge up to 100%; this can
be changed to any lower value, and the root password is required. The charging
is then indeed limited to that value. However, after a reboot, the field goes
back to the default value. I strongly suspect this setting should be persistent
instead, until the next manual modification.

(This is linked to the older bug
https://bugzilla.opensuse.org/show_bug.cgi?id=804486 )