Public bug reported:

I'm on an Acer Aspire E5-773G which is currently connected to AC power
and has its battery fully charged.

Nevertheless, `upower` reports the battery status as "discharging" and
also the standard Unity power indicator shows the normal full-battery
icon (not charging) and a percentage of 100%.

ANd what is even more strange is that the battery's "energy-full" value
suddenly is bigger than "energy-full-design" although it used to slowly
decrease during the last months and was a few percent below last time I
checked.

This is the `upower --dump` output:

Device: /org/freedesktop/UPower/devices/line_power_ADP1
  native-path:          ADP1
  power supply:         yes
  updated:              Mi 03 Aug 2016 13:04:03 CEST (14551 seconds ago)
  has history:          no
  has statistics:       no
  line-power
    warning-level:       none
    online:              yes
    icon-name:          'ac-adapter-symbolic'

Device: /org/freedesktop/UPower/devices/battery_BAT0
  native-path:          BAT0
  vendor:               SANYO
  model:                AL15A32
  serial:               41547
  power supply:         yes
  updated:              Mi 03 Aug 2016 17:06:34 CEST (0 seconds ago)
  has history:          yes
  has statistics:       yes
  battery
    present:             yes
    rechargeable:        yes
    state:               discharging
    warning-level:       none
    energy:              34,9872 Wh
    energy-empty:        0 Wh
    energy-full:         37,0444 Wh
    energy-full-design:  37 Wh
    energy-rate:         10,3452 W
    voltage:             17,321 V
    time to empty:       3,4 hours
    percentage:          100%
    capacity:            100%
    technology:          lithium-ion
    icon-name:          'battery-full-symbolic'

Device: /org/freedesktop/UPower/devices/DisplayDevice
  power supply:         yes
  updated:              Mi 03 Aug 2016 17:02:03 CEST (271 seconds ago)
  has history:          no
  has statistics:       no
  battery
    present:             yes
    state:               discharging
    warning-level:       none
    energy:              34,9872 Wh
    energy-full:         37,0444 Wh
    energy-rate:         10,3452 W
    time to empty:       3,4 hours
    percentage:          100%
    icon-name:          'battery-full-symbolic'

Daemon:
  daemon-version:  0.99.4
  on-battery:      no
  lid-is-closed:   no
  lid-is-present:  yes
  critical-action: PowerOff

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: upower 0.99.4-2ubuntu0.3
ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13
Uname: Linux 4.4.0-31-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: Unity
Date: Wed Aug  3 17:35:20 2016
InstallationDate: Installed on 2016-05-04 (90 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
SourcePackage: upower
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: upower (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug xenial

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https://bugs.launchpad.net/bugs/1609469

Title:
  Battery reported as "discharging"  when 100% charged although on AC
  power

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