[ArchLinux] sensors_battery doesn't work

[GrbavaCigla]

Platform

• ArchLinux kernel 5.4.5-arch1-1
• 5.6.7

Bug description
When laptop is plugged the sensors_battery() gives wierd result

sbattery(percent=95.9349593495935, secsleft=<BatteryTime.POWER_TIME_UNKNOWN: -1>, power_plugged=None)

import psutil
psutil.sensors_battery()

Test results

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ERROR: psutil.tests.test_system.TestSystemAPIs.test_disk_partitions
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Traceback (most recent call last):
  File "/home/cigla/Documents/Dev/psutil/psutil/tests/test_system.py", line 536, in test_disk_partitions
    psutil.disk_usage(mount)
  File "/home/cigla/Documents/Dev/psutil/psutil/__init__.py", line 2120, in disk_usage
    return _psplatform.disk_usage(path)
  File "/home/cigla/Documents/Dev/psutil/psutil/_psposix.py", line 125, in disk_usage
    st = os.statvfs(path)
FileNotFoundError: [Errno 2] No such file or directory: '/home/cigla/documents'

======================================================================
ERROR: psutil.tests.test_linux.TestSystemDiskIoCounters.test_emulate_use_sysfs
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Traceback (most recent call last):
  File "/home/cigla/Documents/Dev/psutil/psutil/tests/test_linux.py", line 1194, in test_emulate_use_sysfs
    wsysfs = psutil.disk_io_counters(perdisk=True)
  File "/home/cigla/Documents/Dev/psutil/psutil/__init__.py", line 2168, in disk_io_counters
    rawdict = _psplatform.disk_io_counters(**kwargs)
  File "/home/cigla/Documents/Dev/psutil/psutil/_pslinux.py", line 1125, in disk_io_counters
    for entry in gen:
  File "/home/cigla/Documents/Dev/psutil/psutil/_pslinux.py", line 1110, in read_sysfs
    (reads, reads_merged, rbytes, rtime, writes, writes_merged,
ValueError: too many values to unpack (expected 11)

======================================================================
FAIL: psutil.tests.test_system.TestSystemAPIs.test_sensors_battery
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/cigla/Documents/Dev/psutil/psutil/tests/test_system.py", line 863, in test_sensors_battery
    self.assertIsInstance(ret.power_plugged, bool)
AssertionError: None is not an instance of <class 'bool'>

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